Just ending the game would have been a good way to implement the snitch, tbh. It would have more strategy, more reasons to block the other seeker when you’re behind. If there really had to be extra points, it should have been worth 10 points or something.
Yeah, I usually go down this same thought process every time I re-read the books. I usually end up at, “Yup, she went out of her way to avoid Quidditch by using feebler and feebler excuses every book.” It’s a shame, because it really could have wound up an exciting part of the series if it was more thought out.