remove the ball from the fairway or green that's there.
Camera's. Some holes you have no reverse view of the green, and have to guess on the wind. Or with putting. Just not fun.
make coin rooms a 60 second timer
Add alt shot/match/skins to mobile
Fix the tee markers as some of them are not able to be played on mobile, only PC.
For stats, add in an option to look at last 7 days, last 30 days, last 90 days and lifetime. This helps players see improvement. Right now, the only number that changes is my 1 putt, 2 putt and 3 putt percentages.
Putting green for every course. Right now, the putting green play stinks. The hard putting green is useless as if you miss the putt it's off the green and you have to start over. 100% waste of time.
how about some coin conversion (ie: 1,000,000 coins for 1,000 credits or something)...this would entice folks to play coin rooms.
speaking of coin rooms, how about a 9 hole room other than Shanghai?
i'm sure there's more, i just can't think of them.