FFB strength is not really an excuse, there's an option to turn it down if you don't like it high. Or the other way round.The only problem with F1 and X1 is the deadzone, mechanical and electronical on the DFGT. The G27 doesn't have any mechanical deadzone on the other hand.
I tested the G27 and I didn't have the feeling that it were too strong. I actually found it easier because it doesn't have any mechanical deadzone. It's very individual though, I heard people saying that even a DFGT on 10 is too strong, whereas I can hold it with one finger at FFB 10 and personally think the wheel could be stronger. (No, I'm not trying to show off or whatever else nonsense. That would be plain ridiculous. I'm just saying how it is.)
The only reason why I'm still using my DFGT is because I wanted to wait for the next gen consoles and possible new wheels for them.
A little electronical deadzone is needed, otherwise the two motors of the G27 would constantly be working against eachother. That wouldn't be any better btw.
There's also no firmware update for the G27 which gets rid of it either.
I also don't think the deadzone is gone in the demo, it simply isn't very noticeable when driving relatively slow cars.