-wall customizations.
players can customize the walls color, with a payment of gold, or buy a pack of multiple walls.

-LEVEL 12 STORAGES(dark elixer LEVEL 7(adds 100k space)<------MOST IMPORTANT I WOULD PAY MONEY FOR THIS
This would make it so that players can save up more at a time and would greatly help top players save for stuff!
it would cost 2 mil for upgrade, 4 days to complete, and would add 1-2 million storage space. The loot handicap would only have to be changed for amounts past 8 million of each loot!

-troop customizations(i dont know if this is ruled out, but the top two arnt)
things that determine troop level would stay(lvl 6 balloon with skull design, barbarian with different helmets),
but you could customize the color of them, such as wizards having green coats, barbarians with a different hair color)

just in general, i think more things should be able to be personalized/customized. i honestly don't care what they are.