If the wheel values are 500-900, as opposed to 300-900, then I would think averaged for a sample size, yes, the players are winning more money in both the main game and bonus game.
More difficult bonus round puzzles will take care of that problem. (I don't know whether that's the case -- I don't have any win/loss statistics.) I have noticed that ever since they moved the starting position of the wheel for each round, Pat has been landing on the $5,000 space in the Final Spin much less frequently, but I don't know when that change took effect.
As for "Jeopardy!," a question: I don't get to watch as much as I'd like, but in the few times I've seen the show recently, I did notice a slight uptick in the number of players in the lead who were betting to tie in Final Jeopardy! rather than to win by a dollar (my hunch is that this is a result of the recent media attention to Arthur Chu and his gameplay methods, but that's a different discussion). Is this a trend that has been occurring this season, and more importantly, has it been succeeding?
Naturally-occurring ties are exciting, but it's my opinion that a tie that comes about because the leader bet $2,400 instead of $2,401 is not a satisfying conclusion. Unfortunately, if that behavior is becoming more common, then the only way to discourage it is either with more difficult Final Jeopardy! clues (also bad television, and doesn't stop contestants with a lock game from betting to tie if they get Final Jeopardy! wrong) or a rule change. I don't like the idea of a tiebreaker clue in ordinary gameplay, but I have to admit that it would be the least conspicuous way to encourage contestants to wager to win.