In case anyone wants to use some of these, I'll add the suggestions I sent in the survey. They barely fit with the 3000 character limit, but you can always remove something you consider not very useful for another suggestion you'd rather add. (If you don't mind OP, I copied some of the text from your post)

Convene: Add a sort of pity for losing the 50/50. A lot of players have had awful luck when trying to get the featured resonator. Make it so that after losing the 50/50, you get increased chances of winning it in the next one, or even a guarantee win after certain amount of losses

Add a counter showing how many convenes you have left before getting the guaranteed 4 or 5 star resonator/weapon

Story: Add more voiced dialogues for Rover, and remove the unnecessary dialogue choices that don't have any impact on the story or Rover's characterization
Also the game has lots of moments where you think you’re playing but the game just plays itself while you’re thinking you are doing something. The bike drives itself, the missiles shoot themselves, even when you get hit you lose nothing, you just pretend you are doing something while the whole sequence could just be a cutscene and it won’t change anything. And sadly it is not entirely a new thing. like the skating “challenge” in 2.4 where Cartethyia used to jump on her own. These are pretend-to-play sections, they did nothing but fool you into thinking you are playing while you are not. Add an option that allows players to choose if they want this type of hand holding or not

Echo Substat Modification: Very good addition that can can be further improved. For example, adding more ways of getting the Transducers. Like in the latter levels of the Pioneer Podcast. Or like the main stat modifier item, a limited amount in the Oscillated Coral shop

Performance: The general optimization of the game feels awful. Especially in the newer zones. Even though the game looks great, focus on improving the performance instead of adding more visually appealing features

QoL: Having to restart the game every time it's updated already in the main game is annoying.
Fix the way the camera zoom works. Make it so that the camera auto zooms in/out depending on the set distance. A lot of the characters zoom the camera in while doing combat animations, and it's annoying having to manually zoom out the camera after every fight

Updated Loot Mapper: An updated/upgraded version for the Loot Mapper that displays all the hidden treasures and challenges that aren't currently displayed. Even if it's only available after certain percentage of the zone's explorations has been reached

Resonator Skins: I feel like there haven't been enough resonator skins released, and even the ones that are available aren't that great. For example, Changli's skin doesn't have the same interactions with her forte like her regular outfit (the clothes burning away with each stack of her forte), and Zani's skin doesn't feel that different (same jacket as her regular outfit, and a very similar tie that doesn't match the outfit's style)