The real question is why do the families have to move on? If the coach is not doing all these things and or their kid is not keeping up, the coach has to man up and step aside or the parents need to help the move get made. It is not a bad thing, coach can cut kids and parents need to cut coach. One needs to be careful that they have a better option but if many of the things on this list are happening.... time to cut the coach.
It would be great if you could get most parents on board to evaluate a coach each season, but it just doesn't work that way. Many lousy coaches think they are doing parents a huge favor by coaching - their time primarily. Some club coaches confuse their ability with that of recreational town hockey, which is really where they belong.
Some club parents think club hockey isn't recreational hockey, which is really what it is.
There is so much youth hockey opportunity out there. Even if you have a decent coach, after a couple of years its a good idea to go get exposure to different coaching. If you've been on board a mediocre team for a couple of years, do yourself and your player a favor and at least go tryout elsewhere. It may just be the best thing you can do for your little bender's development.