Just wanted to note that Quidditch is in fact a perfectly workable game - if you just change up the player strategy a bit.

It's like a game of attack/defense where different plays can be worth different amounts - you go for the highest-payoff thing (the snitch) most of the time, but sometimes you also go for the less valuable things to get free wins or distraction.

If the snitch is the most valuable resource, then just have everyone on your team work towards catching the snitch. It's certainly not what Rowling intended, but it makes sense - catch snitch first, win game. If a seeker can find the snitch quickly, then 5 practiced teammates should be able to keep track of it almost all the time. Then it becomes something more like a race, or dogfighting - particularly if the snitch moves according to predictable patterns so that there's reasonable strategy to it. As the snitch takes longer to catch, it makes more and more sense to split someone off to take points with the quaffles. At this point quidditch actually becomes a high-skill game again, capable of containing brilliant plays that advance your team's position both in terms of catching the snitch and in the slow game.