The dark side of this disparity is griefing; max level players are able to easily disrupt questing areas in use by players of the opposite faction, and can one-shot most enemy characters. Sadly, even guards in most areas are unable to stand against well-equipped max level players, especially as the current expansion progresses and gear steadily increases in power. Of course, the best answer to this is usually to recruit some max level players of your own faction, or switch to a max level alt, and make the griefer regret the day they flew into Goldshire.
I found that in most cases, I could pick the zones I liked and skip everything else. It was slower, but I still wasn't forced to do quest zones I hated (and, notably, I skipped the entire Cataclysm expansion's content -- sorry, Thrall.) I did do dungeons, both in group finder and by two-boxing (more on that in a moment as well), but only once for the quests, and mostly to clear what felt like an awfully long slog from 40 to level 80.
Edit 20 It’s been a week since this post and a lot of people are still reaching out to me with questions which is fine. I have had a few different people reach out to me to help make YouTube videos based off this guide and more info in BFA which I’m more than willing to do. Whoever gets the videos up first I will link them here for you guys to enjoy.