To be clear, this will be a new voting operation that specifies mana consumption for each vote instead of upvote percentage?
But the existing upvote operations will still work? We should be extremely cautious about deprecating any operation that hundreds of third-party tools are using.
Voting an an SMT requires using the new vote operation that votes with mana directly, but the existing vote operation will continue to work for voting with just STEEM. It already converts the percent voting power in to consumed mana and will follow these new rules.