If you're doing them regularly then 3.3 isn't a big deal but the issue is that 'most' airline pilots won't do them regularly. It's a higher V/S required therefore different thrust and attitude. Add this to a different runway with a different perspective and things are starting to be 'interesting'. Not impossible and not overly challenging but 'different' enough to be something to consider.
Bombay (Mumbai) used 3.3 percent and we were generally close to MLW (which we didn't do often) due to tankering fuel. It was damned hot and crappy vis normally. Like I said, different enough to make it interesting.