Players with Gold prestige or better, may like the idea of an advance server. It would start with Medieval age and would be optional. I'm sure some testers would love to skip stone and classic ages, plus no need of tutorials. With only 150 days to play, would give more time, to reach info age, etc.
Maybe drop some of the earlier dens, make levelling up, more challenging.
Reduce snail time, a lot, but superfast reinforcing. Leaves heroes more time for other stuff.
Another speed up idea, NO TOWERS, just big walls and big armies. No rams, just cats, that have a small random chance, of hitting wall.