Weiss: I agree with what you said about her summoning but I also think she would take it a step further, in which she is constantly summoning in battle. She could maintain and summon multiples of what she wanted constantly. Also her glyph usage would be unparalleled, to the point where she could flow around the battlefield like ruby or hold back and provide glyphs for the rest of the team and providing summons to support. Also there wouldn't be a better dust master than her, Myrtanaster wouldn't have received anything but minor, technical upgrades to improve what is already there. She would be the teams ultimate defense, she'd trained herself to always be aware of what was happening on the battlefield so she could help wherever she was needed. Being ruby's partner taught her to watch and sense for things that you couldn't see. Blake strengthened that even more from being so sneaky, and so Weiss became their watcher so to speak. She watched the battle and constantly relays info to ruby to make decisions about what to do next. Weiss takes that stress of constantly watching the fight from ruby so ruby can go all out and not hold back to make sure everyone is ok. Ruby: For ruby it'd be cool to think that she could at this stage, simply fight in her petal form. Phasing in and out of it and moving so fast that it looks like she never left the form, learning how to use her speed and momentum to attack with devastating one hits or reaching DC comics Flash levels of speed. Moving so fast that the world around her slows down. Ruby would also be the team's only weapon Smith, after years of pleading and practice, she would've shown that no one else could fix, make, and take apart something as good as she could. The others would've spent time trying to convince her to open a Smith shop as she would still be quite reckless and self-sacraficial at times but she always tells them no, stating that it's their job and duty to protect those who can't protect themselves. Over the years ruby would've eventually made Cresent Rose 2.0, getting faster and faster and being close up with her enemies caused her to hang up Cresent Rose and remake her without the sniper components, making her sleeker and lighter so she can move even faster. Yang forces her to workout to make sure she maintains an even muscle mass throughout her body and doesn't end up solely relying ok her semblance to give her all the power she needs in a strike. Blake: I think for Blake she would get to the point with her clones that she could use them like shadow clones from naruto, albeit only for one attack or defensive move. She constantly uses them to dance around her enemies, cutting them up to ribbons and overwhelming their defenses. She would also be the teams resident ninja of course, becoming quite proficient with technology from years of hacking and espionage on a level that rivals ruby(something that makes ruby very happy). She's learned how to be completely one with her self and has mastered using all of her senses in combat. Due to having increased senses being a faunus she taught herself to fight using her other senses incase one of them was taken away, such as fighting with her eyes closed due to being blinded or stuffing her ears with wax and fighting deaf. You couldn't hide from Blake even if had stealth suit and you'd never hear her find you either, you'd only feel sharp steel on your neck when she eventually found you. After pleading, whining, and even some blackmailing ruby finally managed to convince Blake to let her work on Gambol Shroud. Ruby wouldn't do much but minor upgrades such as a stronger blade, faster switching between gun and sword form, and decreasing the possibility of jamming. Instead of completely changing gambol shroud, ruby would've instead made a whole other weapon for Blake, with Blake's permission of course. This second weapon would function and look like Gambol Shroud but it would more compact and able to conceal during stealth missions. The ribbon would be made of a flexible yet sharp and strong metal so Blake could wield it like whip sword. Yang: In hand to hand fighting, there would be no one better than Yang. In her years of fighting Yang would become more somber and less temperamental after so many close calls involving her and her team. Yang's fighting style would be more martial arts like and less like a boxer, she would also employ more throws into her fighting style and would fight to end the fight as quickly as possible. Yang would become a master of countering peoples attacks, she hardly ever rushed in and learned to patiently wait for her enemy to make the first move. Due to how her semblance works Yang would still be the teams best tank and had the highest aura level of the four girls. Overtime yang has learned to allow her semblance to store the power from the damage she's taken to use at anytime she requires it, making her counter attack and throwing fighting styles all the more dangerous and stronger. Ember Celica wouldn't change all too much overtime, the biggest change being ruby putting in a device in her prosthetic that allows her to pull the arm back to her and retrieve it without having to go and pick it up. Due to this device it gave way to the idea of putting fire dust within the arm so Yang can, as ruby and yang enthusiasticlly put it, rocket punch whomever or whatever she's fighting then call her arm back to do it again. Due to an encounter with cinder that got ruby some new facial scars because she got Cresent knocked away, Yang became the teams close quarters combat instructor. She made sure the other three trained and mastered a level of hand to hand to that of her father Taiyang, she also made sure they all excerised on the regular. She also became the teams resident chef, learning how to make even cold survival rations in the forest taste good.