What do you think about making one hero limit for Sacrifice? In my opinion it should help organizing people in public matches. So everyone can fulfill role best fitting character used. Let's say Anarki will most likely be soul carrier, Clutch being defender of totem, etc. You could respawn at any moment with different character if it's time to attack enemy's totem to get the soul.

Also the thing mentioned by 2GD that symmetric maps make much more sense for that game mode. Totem placement is fair for both teams. If they want to keep asymmetric then they should at least assign totems to teams in each round or swap it in following rounds after the first one to solve the issue of odd number of rounds to get a winner.