I'm not a fan of its overuse in slang either. I actually choose the name because of the original definition. reading through a big build is like reading about an epic journey with trials and tribulations, ups and downs, and (hopefully) a final triumphant victory at the end (sorta, since we know Jeeps are never really "finished"). But I expect there will be a combination of project threads, simpler tech threads, and questions about doing the hardcore things. More free-flow than just build threads. and all writeups will of course be cross referenced into the DIY checklist.
to me "hardcore" is used on too many forums. "custom" doesn't quite fit. besides, there is more than one definition to go with Epic
3. heroic; majestic; impressively great
plus I'm a fan of alliteration