This is going to be aids and you've put no thought into it. Just run the established 4s ruleset and it will be 1) more fun and balanced 2) better map 3) easier to spectate 4) easier for you. The only downside is that you dont get to say you came up with it, and honestly I think thats what holding you back right now. Please, put your ego aside and open your eyes. Do you think anyone is going to enjoy playing a game mode where its impossible to score a point because theres a fucking heavy and level 3 at the goal the entire match?
Im sorry, I really dont mean to be rude or anything because this is awesome for spreading the word about pass time, but I find it really hard to believe that you missed all of this.
I mean, just look at this; there's nothing you can do to stop that https://www.youtube.com/watch?v=YkBEW3cR-zk&feature=youtu.be