Just my two cents on the changes:
I like the idea of changing ranked rounds to tournaments and single play only and counting abandoned rounds as +10 or something similar. I think for players new to the game this will naturally slow down their progression as you can only do so many tournaments a week (for those of us who live where you can't enter money ones) and give them time to hit the practice rounds and improve their game. This should also help deter sandbaggers as the only way to do so would be by costing themselves chances to win certain tournaments.
As far as clubs being available by player interaction... I hope this does not weigh credits wagered as a positive criteria as I don't think those of us who live in conservative states should be punished. Heck, the fact I can't enter ready-gos is punishment enough!
Also, I don't feel players of lower level should be able to purchase the
same exact clubs as a legend and tee off from 40 yards closer. The best items should only be available to the top tier otherwise sandbagging will remain an issue as well as duplicate accounts and in a game where players can earn credits neither should exist at all.
Lastly, perhaps a feature to report suspected sandbaggers would work. I mean if a guy who has an average of 78 happens to always shoot 62 when competing for credits it should be clear he is manipulating his average to hustle others. While sandbaggers do exist in the real world eventually their reputation catches up to them and they lose their action.
Sorry for the long post.