Currently, in my opinion, settings on High just aren't that fun. They prefer turtling too much while games on medium become kill the enemy DG as fast as possible. I'm suggesting one inbetween those 2. Maybe changing high to extreme and having the new high be between medium and what is the current high.
I know that was confusing so I'll explain a little more below
Example would be tower strength:
Currently we have the options
High (8400 health or in that area) (400 or so damage)
Regular (5600) (300 or so damage)
Low (4200 health) (200 or so damage)
Well right now the High setting is complete massacre and is really good endgame.
Regular is only good for early game
Low is massacre regardless.
So I propose a setting inbetween these 2
Some thing like this:
Extreme (8400) (400 damage)
High (7000) (325 damage)
Medium (5600) (275)
Low (4200) (200)
This would make it so high would be more of a competative balance. The extra health would make a differance and the damage not overly. So it would make suicide kills (which is a viable strategy) still a viable strategy while making it easier to turtle which opens up more possiblity. All this would require is a SLIGHT very SLIGHT damage lowering. Grunts may do 20 down to 16-18 which is a slightly noticible differance but I in my own mind would play this new high setting. Now keep gold and such the same with their 3 options.
Even if this doesn't work just give a little extra health. This would make towers be a little strong early game and a little weak but STILL very viable engame.