not a bad idea but this would be worth gold end game.
you'll end up with a process where hardcore Q grinding villages will never hit a Q wall/stop.
since Q of tree will keep going up with the soil and wont soft cap it.
This will result a snowball in Q thats not good for the game.
We try'ed to slow Q down to a crawl. we do not want to speed it up again.
and let me remind you Tree now work on decay hits. if your town is not super active (what brings more decay hits) then youll fall behind very quickly