Creature experience in WOG.

IMO, experience is unnecessary. In general, they've overcomplicated WoG to the point where, personally, I find it not very interesting to play. There's a classic – that's SoD. It's the most interesting to play. But, on the other hand, there are as many opinions as there are people. The only thing I would change in Heroes 3 is the mass spell system (for example, slow – the strongest trump card and one of the most basic and unreasonably cheap spells). I would either increase its cost and reduce its duration in proportion to the strength of the magic, or make a system similar to Heroes 2. By the way, they did exactly that in Heroes 4.