Slor,
I'm sure your thrilled with all of the "feedback" here so far. Sorry couldn't resist.
Regarding the formats ... Deviations are fine with whatever you choose. In fact I like the league the way it is set up now. Very simple to follow - not involved. Just what we need.
I do have 4 things that you may want to consider.
1) There's not enough reward to win a match. 2 points for a win vs. 1 for a loss just doesn't give winning enough positive incentive. 3 for a win vs. 1 for a tie would work better in my opinion.
2) It is sometimes hard to schedule a "tie" in a week. How about making it 2 weeks per "tie" (by the way it is still hard to remember "tie" doesn't mean no one won the match)
3) Alternating games week to week would be fun. Week 1 = match play, Week 2 = 4 ball, week 3 = 2 ball (alt shot) ... etc. etc.
4) Need to have someone responsible be the captains of the league. The hardest part has been hooking up with some of the other captains to set up the matches. I know that's not something you control but ... any advice you can offer is helpful.
Just some thoughts.