Firstly, good players are always on demand, no matter their job.
SMN may not be in the best spot regarding FCoB right now. Mostly due to the inherent MP issues brought on by the multidotting and lack of breaks for MP regen, the DPS values and kit are still very competitive. You definitely can make SMN work even in the current endgame content, though bringing a BLM over a SMN is the meta in the current right now. SMN is still extremely strong outside of FCoB.

My group currently runs a DRG, SMN, BLM, BRD setup and our SMN parses roughly:
t10 - 485
t11 - 437
t12 - 472
t13 - 469

These are all still very healthy numbers and you should play the job if you find it enjoyable. If Square-Enix deems the class to be too broken to be viable now, I am sure they are going to bump it to be up to par by 3.0 at latest.

TL;DR: Play SMN if you like it. You can make it work if you really want to.