Nothing to suggest altitude data wouldn't be there, in fact there's nothing to suggest any instrument malfunction other than airspeed.
I'm also still not convinced by the "fighting roll tendency" theory either, in fact my position remains that we don't know what was going on past a few discrete facts and that any further speculation will be just that.
@Graybeard : I think any air data malfunction -> instant Alt 2 because in that situation none of the protections can function reliably.