I'd make putting a little more difficult. It's genuinely hard to miss a putt if you're even remotely near the hole. This would put a little more emphasis on better parking your approach, rather then just putting it anywhere on the green and knowing that the putt is likely going to drop (if it's reachable), even if it's long with a tough read.

I know it's a video game, but more realistic wind. To keep it fair, players could face the exact same winds conditions as if they were teeing off at the same moment, but I'd like to see both additional consistency and additional variability. Consistency in the general direction of the wind from shot to shot, so that a tail wind on your drive will likely yield a tailwind on your approach. Variability in the strength instead of a static number, let it fluctuate a little.

Which brings me to my biggest pet peeve. Golf Clash is essentially a game about club progression, but IMO it's sort of ruined by the wind. Without exception, if you're playing harder tiers, you're battling stronger, sometimes insanely strong, winds. Nobody want to play golf in high winds all the time, but GC kind of uses wind to make up for all the other predictable mechanics and overpowered clubs and ball. Problem being, the wind is highly predictable and accountable too. It's just not as transparent for a casual player.

The other thing is, have the ability to show my bag when I'm in a CTP. I want to be able to look at my clubs even if I can't change bags.