Yes, MAPR replaces the previous STEEM transfers. If you wish to have the STEEM just sell the tokens.
It was impossible before to compound earnings - well, possible but it meant users would have to trust me holding their rewards and it would quickly become horribly complex!
RE: MAP Rewarder: MAPR Payouts to Delegators and Price Increase for Token-Holders for 9 Sep 2019 (20.0% APR)