I'll make an assumption that you feel it is not a good thing....just to take a side and start the discussion.
Some of your more successful coaches are non faculty coaches or to put it another way, some of your least successful coaches are faculty coaches. Being on faculty does not insure success. If it did all these schools with faculty coaches would be the most successful....so in my opinion....it doesn't matter. If the school has access to a non faculty coach that played ball at a high level or had a kid that played in a D-1 program, they probably ought to take advantage of them. If a school or school system has the ability to put someone on faculty that could be coaching at a D-1 level...they probably should, but most of those people have a coaching job already.
Pat Summit said it was all about the players...great players make coaches great coaches. A great feeder program (which the coach can help put in place) is probably far more important than the people that get a few short days with the kids before they go play.
All that having been said any program needs to be run straight up. Best players play...period. It doesn't matter who mommy or daddy are. Good moms and dads want that for their kids anyway. Better to learn it now than out in the job market with a family to feed. If kids start playing because of who daddy is or mommy, it is over....the rest will be there but not give it all they have...and it takes giving everything to be successful as a team.
All that having been said if you have a parent doing it because no one else wanted to or a faculty person doing it just to make a few bucks...it is going to be a tough thing. You are really getting what you pay for there....but if you have someone that has been doing it a while, just because they love it and they want to help the kids....especially if they are moderately successful...you better leave it alone. Things could get worse real quick with athletes deciding to move to other school systems to play even if it meant losing a year to do it.
I would say is that any group of parents considering is it good or bad should consider that if you could flip a switch and change coaches tomorrow, it takes time for a new coach to come in and develop relationships with college coaches, umpires, etc. By the time those relationships are formed five or six classes could have graduated with kids that could have played college ball missing out.
Better the devil you know than one you don't.
The last thing I would say is that if a coach has a young Monica Abbott or Roger Clemens playing for them they are probably going to look like a great coach. If not...all they can do is try to teach the kids good fundamentals and hope for some breaks.
Just an opinion...what does everyone else think?