it is somehow fixable
remove/restrict all items that cause a huge difference after switching
he can make 1 set of cards for each class or type of class (arcane/LA/HA) or make S+ set as main set and other cards to lose their stats being unefficient to use afterwards so no1 switches these keeping all at same lvl
restricting rings phy and magic
restrict the ascended defence cape to 750 vitality (so vit classes wont hit enough in order to be needed to switch it)
so people will be left with stuff like weapon, 4 pieces armor and idk... 1 neck? still better than 16 items switch
also aga has said be4, when ppl switch MANY items it lags the worst, the lower the amount = the better