I hear you on one thing, I also find my meter is worse since I went to Windows 10. Sometimes good, sometimes terrible. And the ball often moves across the sky like an old stop motion film.
I'm rather surprised to find WGT no longer works on XP machines though, never heard that before.
And the space bar issue is a Chrome fault, nothing to do with WGT as far as I'm aware.
As to virtual OOB lines, yes, they can be frustrating when they occur too close to fairways but WGT have to draw the lines somewhere and since we're all aware of where they are most of the time we only have ourselves to blame if we ignore them.
If I may go back even further in time, how about Links 386? Where you could play the ball to anywhere you liked on the entire course, that was great fun. Made for rubbish scores but playing cross golf was brilliant. Come to think of it, Links 386 also had a feature I've long been asking for here. Go into the red zone on the swing meter and you got a longer shot but you had to be very accurate with the ding/snap. Risk/reward, it's what keeps life interesting.
As far as WGT goes I'm a die hard fan. Sure I've spent some money on it but given the hours of fun I've got out of it I consider it good value. It has it's faults, no doubt about that but considering the scale of what they offer here I think they do OK well most of the time.