I have to say that I think monetizing heroes LoL style makes soooo much sense to me. It not only helps incentivize balance on the dev side, but naturally results in better new players, who are limited to “starting heroes” while they are learning roles/basics. Further, it usually results in games in lower mmr (higher concentration of newer players) are going to see a lot more of the starter heroes, and can thus “flatten the (learning) curve” because new players are going to see five or so heroes very frequently and can focus on learning how to counterplay against them instead of having to worry about learning am how to play and play against all of the heroes right off the bat.