For the first races this year, the McHondas were upshifting impossibly late so that almost at all times the revs stayed above 11000, even after the upshift. Only in the occasional freak corner combination would you see anything else.
The reason for the high revs was most likely to avoid resonances but it must have cost them a lot in terms of power and heat production.
This video from yesterday:
https://www.youtube.com/watch?v=4o-V8uVtooE
shows Vandoorne often hitting 108xx and even 107xx rpm after upshifts. Still higher than the rest, but less extreme than before. Probably they found something in the Bahrain test that allows them to run closer to the engine killer (but otherwise optimal!) rev range. Caveat: he might have been in a detuned engine mode, because his speed seemed to max out at 306km/h in a straight with DRS on.
If they can do this in the race, I'd expect improved engine performance (also hinted by Alonso posting mid-field FP2 times in this power sensitive track).
It will be interesting to see where they are (and how they gear it!) once they can run in the optimal rev range like everyone else.
Rivals, not enemies.