Even prior to the potential news of RH routing orders to certain market makers for greater margins, I think any serious trader looking to optimize orders would

Even prior to the potential news of RH routing orders to certain market makers for greater margins, I think any serious trader looking to optimize orders would have not been using RH to begin with. The feature set in RH is straight up heavily diluted compared to other brokers like IB or TD (TOS). There's no way to set exchange parameters in RH, users can't edit the charts for TA, and the functionality is heavily reduced on purpose for the sake of not overloading users that have basically no clue what they are looking at anyways. Not that any of this excuses RH. Given RH's user base, some random person trading PLTR and GME calls probably is not even looking into any of this stuff to begin with.