No, Level 5 feeds directly into the SPFL. They certainly have a say - they will not want their member clubs potentially being relegated to a league full of unlicenced clubs. As has been said before - the time to discuss a three region Level 5 is once there are enough licenced clubs to form it. The grace period was five years ago. Level 6 is the entry point now for unlicensed clubs.
There is nothing stopping any West clubs finding a groundshare, should they wish. A licence isn't all about the ground though.
I'd be interested to know how many West clubs actually own their grounds as opposed to renting them from the local council. To me, there is no difference between renting a council ground and renting a ground from another club. If it suits the clubs and they have secure leases, why not? Yes, there is a balance between the clubs' historic location and how far away is reasonable - and I agree some clubs have pushed this quite far...