Zardnaar
Legend
I'd find it peculiar to argue 4e is more rules heavy than 3.x
I like both and am frustrated with both for mostly different reasons. As with 5e, we are a difficult lot to please.
Depends how much you throw at it.
4E core books only even 4E fans probably don't want to do that. 3.5 tends to work better core only.
More feats/powers means more complexity.
You can play a basic class in 3.5 it may not be very good. 4E everything is a spellcaster in complexity. Think the character sheets were 5 pages long vs 2 or 3 or 1 in earlier D&D.