No way does a Hornet lug as much ordnance as an A-6 used to. I'd tend to question that business about "more with less" -- more flexibility, maybe, but not more iron on the target. Plus, the A-3's went away, too.
No, but the F-18 carries the precision guided munitions that have come along after the A-6. It can do more with one or two smart bombs than an A-6 could do with its entire bomb load. The key is not how much ordinance you can carry but how much can you get on target in a single strike. Plus it can operate as a fighter when necessary, which an A-6 or A-7 could not.