It seems impossible to please everyone :) - there is logic and there are personal wishes - I am probably still against the unification in the upgrade and for greater specialization of heroes, but increasing the number of skills to be upgraded from 1+5 to 1+6 is not so critical (far from 1+10)
PS:
1 - racial skill
5, 6 - number of generally available skills
Added 7 minutes later
Many reduce the game to the goal of "leveling up an uber-hero," forgetting that the main goal is victory
Блистает там воздушностью прогалин.
Но между кедров, полных тишиной,
Расщелина по склону ниспадала.
О, никогда под бледною луной
Так пышен не был тот уют лесной...