If I say yes I'll get badgered, same if I say no.
The truth is that while I can't directly compare a similar res body, the resolution of 24mp files from crop sensored nikons such as the d7100/d7200 at lower iso is nothing short of great. I did notice though (more so with the d7100) that noise crept in faster as the iso raised up, (when compared to say the 18mp canon 7d). I'd imagine that the slight blurring effect of the OLPF adds an effect similar to noise reduction while in place, as it does slightly smudge detail.
So for example, if I took 2 raw files, one from an 18mp and included OLPF and one from a d7100 without, at say 3200, the canon would to my eyes appear a little cleaner. Say for example also then that I want to clean them up, I may add 10 lumunance noise to the canon, and 15 to the d7100 to equalise them out. They would then have similar noise, but even though I added more reduction to the d7100 it would still have more detail, but this is likely because it has more res.
I'd say for very low iso shots the OLPF helps, for higher it makes no difference,
At least this is my experience