A bit unfair while you can "dodge" hard moments on your tribes. 

They could still make it so that u can only save/autosave when 10 minutes have passed,or,oh I don't know,when no enemy units are near u and ur castle.

Definitely autosave, otherwise you could save when your tribe was at it's strongest, and then charge into battle just to come out un-wounded. 

yes this is a extremely good idea. I have had this same problem.