The R46s condition at CI is exaggerated on here. According to that NYCT performance chart the R46 MDBF is pretty much the same as it was last year at this time, the fleet overall fleet MDBF went UP, actually.
I doubt that the N/Q lines intervals are being dropped in the masses daily cause the R46s there are supposedly breaking down so much. Yeah they have dead motors, etc but the trains are still able to run. I'm sure the union would have bought the issue to the media attention to bring back the 32s to increase the space factor by now or something those lines.