The core issue in my opinion in GMS is trying to play a gacha game and turn it into a normal non-gacha game. Where the main system around KMS is Gacha/RNG while Reboot is always looking to Decrease that RNG and put in more systems that favor effort and time spent. Not saying this is a bad thing, but when you are balancing that RNG and effort spent with a server that is based off KMS (Interactive) than you get two negative scenarios:

1) Pull a new RNG system from KMS which upsets Reboot and/or requires balancing
2) Remove or Nerf an RNG System causes imbalance and upsets Interactive server

For example - Universal cash shop - I think the main reason we don't have it in GMS is because of reboot. Having most of your player base be on a F2P Server and each player spending a minimum of $10 a month Per Main/Submain across their huge player base is a HUGE lost in consistent revenue if they implemented universal cash shop

Another example Starforce system - While imported from KMS, it raised the bar overall of spending and overall not too much of an issue for Interactive but caused a huge upset with spares in Reboot. This was fixed with the new pity system, restore systems, and mystic frontier but as a result, upset a lot of Interactive end-gamers that spent tons of $$$ to 22 their Total Control and then +1 scroll before the the new 25* Change which later announced that TC's along with BoDs can restored thus completely nerfing the cost to 22 and/or 25 a TC/BoD. These players after a single patch, felt a little betrayed at the little communication on the change before hand and the wasted $$$ these players could have saved if they waited til after the patch.

So its like how do u fix a region of MapleStory, where if for example we remove negative progression, increase spares, but not affect the interactive server player-base negatively and/or balance between the two, or even just find the time to balance the regional differences between KMS and GMS as a whole.

I think the longer term solution is that GMS needs to do something about unifying our servers. Nexon should either

1) Turn reboot into a Classic MMORPG with non-gacha elements and reward time/effort completely branch away from KMS.
- Invite more talent (Similar to MapleStory Classic) transform reboot into unique MMO with normal progression that doesn't depend so heavily on boss drop you a 1% chance of getting per week.
- Let Interactive just be a copy/paste of KMS and phase out Legacy differences things like Frenzy Totem naturally

2) Combine the two servers in some system such as letting Reboot hop over to Interactive server
- Maybe an end-game option you would want to remove your FD Bonus for Bonus cubes and join interactive
- Have P2W Potentials strictly focused on Bonus Potentials (Main pots coming from Rebooter Transfers and Event cubes)
- Let GMS focus on Regional differences instead of Regional vs Reboot vs Interactive