You've got some great points here about companies trying to bootstrap esports out of nothing. Ideally, the activeness of the community would determine what games can support professional play; bottom up, not top down.

As for pacing and viewing experience: I'd whittle your list down even further if we're talking about the ideal esport. Most MOBAs are way too visually complex for non-players to understand what's going on. I always thought that fighting games made the most sense for a mass audience. Even if you don't have intimate knowledge of how a particular fighting game works, it's easy for anyone to understand what's going on and parse visually. You can see the entirety of the action instead of having to jump around from player to player. And some fighting games (looking at Smash Bros, Mortal Kombat, Street Fighter) are wildly popular already.