Just done a few in August - got some direct and some via AUH. Either way it's inconsistent
Ive tried a few dates right through to September, and getting flights every Wed and Fri, and 99% of Sundays barring 1 or 2 dates. Therefore, all seems fine at present.
The Etihad Codeshare is for every day on EY21/22 and has been so for about 12-18 months, so does not cause concern just yet. However:
agree with LAX-LHR that Saudi is easily winning the battle.
I do give the route about 8-12 months. Saudia seem to be reporting strong figures, both passenger and cargo wise. With Flynas seemingly struggling all indications seem to show there is demand for MAN-JED, just not as much as we are seeing, and something will have to give, and based on figures so far, that something in my eyes is flynas.