When leveling up several different heroes there aren't enough potential skills to use all the skill points the hero gets on his way to level 50. This is rather annoying as the prompt to use the skill points is there every turn.
Either give the relevant heroes more Skills to use points in, or should be a dump-talent where you can put in your skill points. Maybe even several of them relating to different aspects of combat power or campaign usage.
Here an example for the beastmen's Bray-shaman:


Build v2.1.2, 16516.2700229 (modded):
Better Camera Mod
Disable Startup Splash Screens / Intros
One Button Respec