Here's my trip report:
I dove in Fethyie and Kas.
GOOD: Water temp 28°C on surface, 24°C at 30m, very good visibility, nice amphoras on each site
BAD: no fish. I found out that they still have an awful way of fishing .... that is ... dynamite.
Fethyie: European Diving Center. Extremely well organized. One boat for beginners, one boat for experienced divers, 12L AL tanks, decent equipment (I rented everything but the computer).
Barracudas and an eagle ray (which is pretty rare in the Mediterranean).
Kas: Barakuda diving (German owned). Despite being germans they are very nice

Nice boat, good equipment, 12L steel tanks, 1 hour diving. If you are experienced they brief you and you dive on your own, up to you.
Groupers, one turtle, big ancient (roman) anchors and amphoras.
I hope Turkish government will set some reserve areas in order to repopulate the sea. If there were fish it would have been fantastic. But one our looking at the blue and hoping to see somenthing ....
Moreover, I would say it is pretty expensive. More than the Red Sea, and this is ridicolous.
ciao