TAS can qualify as heavy, methinks, yes.
But really, a lot of new-school metal lacks that grit that makes for actual heaviness, as opposed to just abrasive-sounding. Some of it is production, but still. No offense, but the bands you're mentioning are what I'd call "gateway" bands, the sort of stuff people listen to when they're sort of dipping their toes into extreme metal. The entry-level stuff can still be good, but personally I don't really get as much out of it as I get from the really nasty stuff. If I want metal, I want it as yucky as possible, and most modern metal is simply too clean and cute.