It seems I'm in the minority but I'm actually warming up to Battle Square. It's a good, different addition to the same old content. You don't need to be a top player or invest any resources in it yet to do well. I don't have any level 200 heros or skills above 20, I haven't invested any resources yet and I reached Gold Square (3000 pts) yesterday. You just gotta keep at it..try new strategies and figure out when and where to place heros. It's definitely a little tedious and I find myself yelling at my phone at times but overall I don't think it's that bad and I'm pretty sure there will be improvements in next update. Everyone has a lot of good suggestions for improvementd in this thread. Just remember what you're playing for..EXTRA heros on attack AND defense. So that old hero you invested so much in, well evolved and is just sitting in your bag after being replaced now becomes VERY useful again.
Here's a shot of rank promotional rewards so far to keep everyone motivated..only need to get to silver square to get enough metals for 2 hero reserves. You guys can do that. With gold sqare rewards and some extra from standard chests, I'm only 30 metals away from 3rd reserve. (30 metals 1st reserve, 60 for 2nd, 120 for 3rd).
See ya in the square!