Let us change the music of our guild halls
I think it would be really cool if we could change the music in our guild halls, for a price of course. We can already change theme, status, and weather. I think it would be fitting if we could choose from the different family level tracks and well as the status tracks. Perhaps we could even have the themes of the different boss lairs!
Let us equip any equipment in lockdown and don't restrict it to loadouts
I find it very frustrating to have to create new loadouts everytime i have a new idea for a weapon loadout in lockdown. It's very inconvenient and time-consuming. Please let us equip any piece of equipment in the locker room. This would make it so much faster.
Sprite and Weapon Costumes
Remember the shield costumes update? It would be nice if we could get that for sprites and weapons. As for sprites instead of having to open a spritebox and heat it to level 100 all over again, which is very costly and time-consuming. We could just get the costume from the box and select the costume in the battle sprite tab, it could use up one of the unused slots of battle sprites, additionally I'd like to be able to choose how my sprite looks instead of it being locked behind which ultimates you choose. Having to reheat reskinned sprites is a huge letdown as it already takes a huge investment just to get your starter sprites up. As for weapons, you won't be able to equip other weapons to be your costume, it'll be exclusive to weapon reskins. For example, if a new Combuster reskin came out and was labeled as a costume. You could equip that costume and it would simply change the skin of your Combuster instead of becoming a completely new weapon.
Prestige Rework
Currently, prestige does nothing other than give a fancy little badge next to your name. I would like to see prestige taken to other places and give a lot more rewards. We could also use some more prestige missions.
For the lockdown thing, I'd like to see that as a gamemode variation, like how untiered and hardcore mode were introduced.
Weapon/sprite costumes are acceptable if limited to the same weapon appearance. I think it should be based on the base weapon instead though - a caladbolg could be used for an acheron skin, for example, but not a sealed sword.
Prestige I've always thought should unlock little fun things at every badge. Perhaps supply depot discounts or some sort of randomized daily reward.
Don't really have thoughts on guild hall music, but it does sound neat.