There will never be a perfect classic. Never. The community disagrees too much. If you released more hat shops, there will always be people saying "we have enough hats, make new towns." If you make new towns, there will always be people saying "This town is useless, there's nothing good in it." It's a neverending cycle of disagreement that cannot be stopped. There will ALWAYS be a group of players that are unhappy.
Anways, for me, these would be my favorite updates.
-More quality hats. I know I'll get hate for this, but I always like to see new graphics, makes everyone look diferent and more ways to express yourself.
-Add more CTF maps. Make it so when you start a new game of it, it's a random map.
-More mini games like archery. I enjoy that.
-Add little quests here and there. Not ones that have any storyline that has to tie in with the rest, but one based on the location. Like at graal city, maybe an NPC got lost and needs to find a way to a certain location in the city. Guide them there and they reward you with gralats depending on the difficulty.
-Do someting to make pk arenas used.
-Make a designated spot for everyone outside the burger refuge so it's not so laggy walking through. Make it so that you don't have to go through it to get to something major.
-More ways to make money. Like mini games and little quests/jobs.
This is all that I can think of off the top of my head.