I didnt want to check in lower hit points and an armor nerf in the same patch. But I am running with a base 6 hp +3 per level right now (instead of 4 + 4 per level). And I may play with +2 per level depending on how this turns out.
Just remember to take into considerations the racial blood abilities that alter HP per LEVEL. all I ask 
Think they would be slightly better if they could be changed slightly too, depending on whether its a hero or a trained unit to gain the benefit.
But you also get access to better weapons and therefore higher attack values?
On one hand people complain about uber heroes, on the other on recruited units with too much HP??
1: Thats technology that unlocks these, not unit levels, this should be alleviated by armor and new better traits, or something else.... (Not really feeling that now, but thats just tiny numbers.
2: I don't want trained units to get worse, just altered. More hp for a level 1 unit, less hp for a lvl 10 unit. Make unit levels to hp do less of a difference.
Sincerely
~ Kongdej