I've all ready played it a year ago. (which is like the only case for you)
I feel the plainville community is to young needs more roots. What i mean is it has a lot more younger players which is not a bad thing in fact its a really good thing more then you might understand. What I'm about to say is in NO WAY ragging on chase and if you take this the negatively please ignore it, the problem in with is see this outcome was from the wrong type of hype, and the hype that was giving might have not hit a home run with the newer players.What i mean is When i played in the League in Abington a little over a year ago there was people telling me how great it was going to be and how much fun i could have and it wasn't serious, becuase of this. This is when i really started playing 40k instead of maybe hear and there. I got to meet great people it was that plan and simple which lead to more connections and games. I know for a fact that some plainville thursday players play with their friends and really don't expand from there there are cases where i am wrong like when ben sets up games for people. Sure over time the barriers from the mini groups could slowly brake over time, But this league could really help make bg community progress faster. It really sad that it failed. I did not think it wasn't going to happen, but i had a feeling that some people might not join. what could fix it could be like what happen to me peer pressure. I mean hey i wanted to meet and play more people and this league made it happen.
I am really tired now ive been up a very long time so sorry if this doesn't make any sense.
I've never been to Plainville, so I don't know whether the following is relevant, but I have seen a clique effect in various stores. You might have hobbyists who disdain opponents who aren't completely painted. You might have tourney players proud of well optimized lists. You might have youngsters who aren't into painting, and haven't the models or knowledge to give the tourney players a decent game.
At one point I was playing in two stores who had two methods for organizing games. One store was dominated by a war gaming clique fighting a campaign where winning a game meant you get advantages when it was time to play the next game. Not to long after, the experienced players got advantages and were able to thoroughly thump the newer players. For some reason, the new players dropped out and started playing only other new players.
The other store did a pyramid scheme. No fluff. You alternated between challenging a player who has won a bit more, and getting challenged by someone who hadn't won quite so much. You ended up playing someone at about your own skill level, but part of the scheme was that players could challenge people they don't fight every week. Everyone played everyone else. There was a minor award given out if a player managed to stay at the top of the pyramid for several weeks, after which point I think he started again at the bottom.
I'm a bit paranoid about cliques. I'm more than a bit concerned about campaigns where winning one week gives one advantages next week. Pyramid challenges might be a way to encourage players from playing new people, but there isn't much fluff or strategy. Not ideal. In a way cliques can be a good thing, as players find other players with similar interests in gaming and similar skill levels. At the same time, the game isn't as much fun if one fights the same opponents every week. A healthy store is somewhere you can go and might have any number of people willing to show you a different opponent.
I've no specific advice, alas. Plainville is a bit far for me to travel.