You know how in our town halls, we can store up to 1000 each of gold and elixir before being dumped into storages. And I've noticed how when you upgrade your TH, only the hitpoints go up and I think it should expand it's internal storages too.
Maybe an extra 1000 each upgrade and being able to store up to 50 DE at TH7 then an additional 100 more for TH8 & TH9?
What do you guys think?
