I don't think it's fair to dismiss his 80's work out of hand. Crises, for example, has some excellent work on it. At least it was different from Tubular Amarok Ridge Dawn, all of which sound remarkably similar.
Frankly, if he releases one more "version" of Tubular Bells, I may snap...
(I like Oldfield like I like GYBE - one a day max - any more than that gets monotonous.)