i think halftime is crucial, have definitely won/lost games because of a momentum swing/adjustment made during half time.sometimes you just get fucking rolled 3-0 in 10 minutes and gotta wake up at half time and try to claw back into it, and removing that would be pretty lame. i think there needs to be a time limit to ready up at half though, have had like 20 minute half times which is a majorrrrrr cooler and really lame.
ban system is bad for regular season imo, use those 8 weeks to see who is the most well rounded, experiment on a new map, etc. and when playoffs come go into the pick/ban system.
alternatively, go with the ban system but teams get a limited number of bans on each map. so if theres 16 matches, you can only ban viaduct 12 times (or whatever number works). Makes bans more strategic,and teams cant just eliminate several maps from the pool for the entire season.