AOO requires sight like any other attack and will be penalized if one doesn't have mitigation for some reason. Tumbling also requires sight, so you can tumble where you desire to go, avoiding the things you want to avoid...or you are treated as if blind like anyone else with all of the...
I pay it time and again, and I played it in the past, and loved it, then and love it now. My leading players play AD&D 2e, but most of them have main characters that started decades ago in 1e and have been converted up into our current game. When playing with new younger players, I often start...