Simple answer, No! Rolex does not produce limited edition watches, there will be thousands produced typically.

Well, perhaps beyond 2014 too. Who knows.

Anyways if you compare the previous black ceramic and this blue-black ceramic model, it's just a two-part different, the bezel color and GMT hand color, green vs blue. Just maybe you can consider buying a 2nd hand black bezel at cheap price and have the bezel and GMT hand parts changed via RSC. I think the total cost (buy 2nd hand black ceramic + swap the two parts ) will be cheaper than buying a brand new blue-black model.

Just my 2 sen.

Why would it wrong? On what basis?

This is perfectly permissible from Rolex policy because you're requesting for part change within the same model. Let me give you an example. In the previous model before the current ceramic bezel insert/inlay, the GMT II stainless steel model (1675, 16700, 16750, 16710) comes in 3 aluminium colored inserts, blue-red aka Pepsi, red-black aka Coke and regular black. You can go to RSC and purchase additional inserts to the one you currently have, though at RSC Malaysia specifically I'm not sure if they will retain the one you are swapping out. In other parts of the world, based on my experience they let you keep it

As for current ceramic model (116710) the same policy should also apply because Rolex does offer the watch in two insert colors, black and blue-black. The black insert is still being offered and no official announcement about it being discontinued.

So, my points then are it is legit, parts can be sourced via official RSC or other watchmakers, and also most importantly cost saving rather than buying a new one at above retail price when it's just insert and GMT hand color changes.