I don't know how realistic they are yet, but I LOVE the idea of a lifelike clutch. Gran Turismo has always programmed cars to shift via rev-matching, so cars that take longer to rev-down, (lose rpms), have extra long shifts. In real life, this does not happen. Cars may have shorter throws, more precise throws, shorter or longer clutch action, but It does not take that long to shift. Any simple youtube video of teenagers driving a manual car will give you all the proof you need.
So I think it's a fantastic idea, and properly working a clutch rather than shifting the "gran turismo" way,
should be faster.
To "level the playing field", perhaps you'd prefer they sell the wheel/ pedals w/clutch,
included with the game. And they could retail it for 200$?
These things should be fixed on a "game" level to be properly balanced and ensure there is no chance for people to get an unfair advantage. Just dividing people up is not a good way to do it IMO. Hell, even in live for speed you'll get a room with people using a wheel, other people using a keyboard, other people using mouse steering and maybe even people on a controller. Then out of those people some would be using auto clutch, some would be using manual clutch. I've never had any issues with it at all.
But if they make stick, auto, and clutch not matter, not only are they taking realism away from the game, but they are also making no need for manual, or a clutch.
Why do what the game will do for you? I drive with manual, because I can run faster laps that way. If Automatic were just as fast, I'd use that, then I'd never screw up! Which would give the automatic an advantage...And there it is. The same rules apply to a clutch. No benefit? harder to operate? costs more money? Why would you buy it? Why would you want to use it?
It takes the skill out of driving, just like those sissy paddle shifters, that way idiots that spend loads of cash on sports cars don't get made a fool of unless their car is actually slower.