All map ranked mode. No voting.
Each time a team wins with their operators in a round, those operators become unplayable for the rest of that game or at least up until overtime occurs.
This promotes true player skill, versatility, and promotes a wider range of play styles for each map and operators used.
Make it an special game mode for one week every month.
As of now players vote for the same, restricted number of maps that many have a very well practiced routine for. Same with operators. Real siege pros will not be limited to one, two or three characters. Make it challenging. With the amount of operators currently, you would have enough to play every round up until overtime happens.
I want to see this change mostly because this game has a lot of unused maps and operators. The siege team will also have more data to collect and comments from players.