I completely agree. The h gate and clutch physics weren't perfect, but it at least allowed a decent representation of shifting a manual gearbox.. .as fast or as slow as you could, but now, in an effort to equalize, they ruined it. As I said, manual gearbox cars that shift slow before should have been programmed to shift as fast as "humanly" possible to match any drivers potential shifting abilities. Assetto Corsa and PCars 2 did a great job in this department by forcing you to pre-select h gate or paddle, and if paddle was chosen on a manual transmission car, it shifted almost as quickly as an SMG equipped car, giving no advantage to a driver rowing his own. Also, there was no bouncing back and forth from one to the next on the fly which has always been a gripe of mine with GTSport. Pick your poison, but cant have both at your disposal. Hope they fix this down the road, but since I rarely use h gate for immersion in GTSport (I go to AC for the immersion and h gate on the ring) it's not a deal breaker for me. I'll continue to enjoy what's good in the game.
Also, it seems the speed of the allowable shift is dependent on car.