What happened to regeneration show the difference between Mom and FE. In Mom, all spell, ability and capacity were great, have powerfull effect and utility. In FE, everything is weak and marginal. I could understand in a multiplayer game (like starcraft 2 ), it's important to equalize ability and spell effect to prevent them to umbalance the game. But in a solo game ? Seriously you remove all the fun.
For regeneration :
-in Mom --> High regeneration in combat (unit have less hp in mom), heal instantly after combat, make the unit semi-immortal
-in FE --> Crap regen in strategical map.