All you need to change the front pads is to remove the calipers from the forks. On the lift not on the lift front end raised or not makes no difference.
The complaint I heard about the fiber gaskets opposed to OEM was that they are thicker and hard to get the nuts on. Most prefer the stock ones even though it takes several tightenings to get them completely squished down
Agreed. No need to remove the front wheel to change the pads. If you were changing the rotors or wheel bearings, yes, but pads, no.
Again, OEM crush seals fit well and work well. On automotive applications, I've had fantastic luck with Remflex gaskets, but I don't see the benefit here. The contact point in the cylinder heads is thin, and the o-ring style crush washers fit perfectly.
There are certain places where aftermarket parts may work better than OEM, but these two areas are not them, in my opinion.