First I want to say that the merged flop raising is spot on and works wonders in terms of realising protection and fold equity so far when I just started incorporating it into my NL5 and NL10 games for two weeks now.
What I still struggle a bit with though is how to continue OTT if called with middling hands. Especially on super dry flops I find these calls quite strong and can't decide whether to turn our hand into a kinda bluff and continue barreling on brick turns (f.e. 87 of Q82, turn 5). Especially since we are OOP I often fear a value raise.
On semi-wet flops which turn wetter OTT I guess now we should usually barrel again with a large sizing as it fits well with our story, (f.e. the third flush card hitting), and I figure we get even better fold equity, but maybe that's also debatable?
One last question: do we merge-raise small PP as well, especially if they are third pair on dry flops? Like 55 on J72 rainbow? With hardly any chance to improve im quite disincetivized to raise and usually call OTF and give up OTT.