Regarding the weakening issue, it's quite simple:
If there are un-upgraded neutral creatures on the map, there's a chance that one cell will contain upgraded creatures. People are saying that by attacking such neutral creatures and then retreating/losing, you automatically destroy these upgraded neutral creatures, and that this shouldn't be possible.
To all: I didn't think such a simple question would cause so much... Sorry.
Но поскольку я нищий,
у меня лишь есть мечты.
Я разостлал свои мечты пред вашими ногами.
Ступайте бережно, ибо вы ступаете по моим мечтам.
