PvP: How you are placed on team Pl or Zom ea match??

Should be switching sides ea match. I know its hard to do bit what we went through of being on a faction more than the other sucks. Especially if your gameplay is like mine where I suck with plants classes yet rule with zombie. I never witnessed matches like this on first two games.

Maybe there should be a check box on which faction a player prefers? Great for developer stats to notice if most play on one side vs the other. Substantiation to improve faction that is least liked via stats.