I don't know why your discussion of your excellent 1992 bike has been moved from the forum designed for the discussion of members' 1992 bikes, but there it is. Authority is often blind, but free men fight on regardless.
My assessment would be that you have a superb frame there, and it's great that you are still using it to the full. The only things that strike me as slightly jarring to the eye are the modern cranks and rear derailleur, which don't suit the frame at all. I appreciate that they give you gears that 1992 kit doesn't have, but mid-90s XT with a 11-32 or 12-32 cassette would give you almost the same range and look much better.
The other thing I notice is that there is very little bottom bracket drop, which suggests that the fork is too long for the frame, unsurprising in a 1992 frame not designed for suspension. If you like the handling, there's no problem, but if you would prefer it more lively then there's what causes it. A shorter stem, preferably with some rise, would solve the problem.
I wouldn't have thought the brakes were a problem at all.