If we can transfer Pokemon from DPPHGSS, which seems likely given the means for acquiring Zor@rk, then Outrage Salamence, Kingdra, Flygon and Altaria will still be available even if the tutor goes away.
Unless they have transfer restrictions that disallow tutor moves but that's not bloody likely, IMO.
The worst that will happen is that Outrage might be illegal with some desirable new Egg Move.
Remember, they also introduced a 140 BP special attack specifically for Dragons (at the same time as base 150 SpA Dragon legendaries) in addition to increasing the power of Outrage by 33% then giving it to every Dragon.
Now we'll have Dragon/Fire and Dragon/Electric Legends and a possible Mold Breaker Pseudo-legendary.
It's pretty clear that Dragons are meant to pwn and I don't expect the type to be nerfed at all.
Honestly, I don't mind...some Pokemon need to be feared.