I’d like to suggest some bonuses for talents depending on their development. Increasing some skills that belong to talent or maybe an extra skill for the full development.
Talent level is calculated as a sum of levels of all hero classes that have this talent. For example, Stone talent can be met in classes Plaguelord, Runepriest, Sentinel and Titan. So maximum is 400, or if you take an average level, it’s 100. That’s when all these classes are at championship level 100. Then Stone may receive another skill (“All Dwarves receive 1 Armor each turn”) or improve existing skills (“Hammer Mastery”: “Gain 3 Magic if using a Hammer” instead of 2 Magic, for instance).