I don't treat the comics as canon but since the staff writers have a hand, I treat it as "writer's intent", which is what I go with until something on screen contradicts it. And even afterwards, I treat it as: "Okay, this is what they had in mind originally." As far as Vulcan and 2079, that goes to another approach of mine: explain something within canon away and just treat it like a contradiction as a last resort. Some people pull the "Canon Violation!" lever too quickly. If United Earth fell apart by 2079, then it would give the Vulcans even more reason to clamp down hard on Earth. That's why they're so insistent on keeping Earth on a leash and held back, even 70 years later, if what happened around 2079 was bad enough. Bear in mind I'm no fan of ENT, so it's not as if I'm trying to come up with excuses for a series I like. No. But there's a rationale that connects the dots and feeds into the narrative of both "Encounter at Farpoint" and Enterprise at the same time.