Like Dusty said make defenders focus on more than just "ALL FLAG" and the tower will be harder to take.
What kinda annoys me is that the attackers only have to push one direction.
I feel like multiple ways to the flag room could be something cool, so you're able to rush more than just one way and defenders don't have it too easy. Maybe even add a gem again(really like the first few gem Layouts) that you've to hit (120times /which would hold 1 min) which opens new ways that leads to the flag or a 2nd floor sounds cool.
As prolly everyone in here I want towers to be really hard to take and to stay quality over quanity.