Imo, the first thing to do is getting the balance right for each of the swing mechanics; meaning, get the full shots, short game and putting on the same difficulty level. Only then can you start adjusting the difficulty between the swing types.
As a 3 clicker and judging Tourpro difficulty on a scale from 1 to 10 for each area of the game it would look something like this:
Long game (all full shots) 10
Short game (pitch&chip) 5
Scrambling (flop&sand) 6
Putting 4
How would you rate MS?
That is a very subjective score for everybody i would suppose.
I am going by the stats at OGT and compare them to the best players in the real golfing world - we are talking about a sim, right? A number of 5 in my scale is "difficulty right on the money. Everything higher is more difficult, everything lower than 5 is easier than it should be:
MS:
- Long game: 4
- Short game: 4
- Scrambling: 2
- Putting 1
3-click:
- Long game: 6
- Short game: 3
- Scrambling: 2
- Putting: 1
I explain my scale: The best MS players hit 5-10 % more fairways than the best pros. It's not like TGC where you can hit the fairways blindfolded. But it is a tad too much.
Pitching is a 5 for me - i don't find it easy especially with the ratio 1:4 and the short game swingmeter. Chipping is a 3 for me cause the ball bites too much, especially out of the rough. So i give a 4 there.
Scrambling in the game is way easier than in real life. You just have to look at the stats at OGT. 15-20% better scrambling percentage and 25-30% better sand saves. That saves a lot of shots.
Putting statistics are insanely low. The best players have 24-25 putts per round on average. That's 4-5 strokes better than the best pros - THAT IS A HUGE DIFFERENCE and the real reason for 62 or 61s in the game.
For 3-clicking the percentages for FIR and GIR are a tad lower than on the PGA Tour - so i give a 6 in difficulty
Short game is easier than with the MS because the swing meter is even slower than with full shots. So distance control and snap is easier and there is no change of mechanic. Mouse swingers have to perform a different motion when playing pitches and chips.
Scrambling seems to be equally easy - the stats don't show much difference between clicking and MS.
Dito for putts: Clickers are as good putters as Swingers.
I have to say that the relative ease of scrambling and putting shouldn't only be connected to the swing mechanic. The lack of roll of chip shots and flop shots (especially out of the rough) plays a huge role on the very good percentages.
And for putting: If you get a perfect picture of the ondulations of the green of course you will make more putts. You are never in doubt if a putt breaks slightly left or slightly right on certain points of the putting line. There is no element of uncertainty. It is only a question if you interpret the BLI correctly. In real life even pros misread a putt (for instance: breaks ever so slightly to the left and they thought it will be straigt). Can't do that in the game because you see every break picture perfect.