The problem of low hit points on humans

[Agrajag]

Epaminondas said:
Agarajag,

I am not sure what you meant by the following statement:

"If I had to hazard a guess, it would be that Arralen thought that the lack of manual on your side has less to do with you playing the game's demo, and more to do with you obtaining a copy of the game in what we call here* cynically 'my uncle from america'".

'my uncle from america' is an expression, describing something obtained from dubious sources, specifically, pirated games.
Furthermore, check out the Lich pretender, he has 30 HP, and that's because his body is "leathery and dry and lacks all organs of importance"
The ***** Queen has 25 hp, and she is a giant werewolf.
A Pheonix has 15 hp.
And I'd say its pretty obvious that there are more pretenders with even less HP, which are less worthy of mention.

So a boost to 20 HP is not minor thematically, and besides increasing a unit from 13 hp to 20 hp is a ~54% boost! (which would make them more than ~54% more valuable and useful)