The middle way would be to reduce the rotation time. Maybe just 30-45min.

I don't think it is good to have forced map rotation for Team Ranked, as you have to be proficient on any map, no matter what your team is good for. This could, if Team Ranked would be active in this game, result in some teams avoiding maps, because their team can play the best on 1 map only. While in tournaments they have to play all maps anyway, and absolutely fail then. Wouldn't be fair to teams that perform on all other maps better than them.

But as Team Ranked, isn't very active, I don't think it matters that much.