We're talking about strictly open world pve, at which Hunters hands down was the easiest class to play. Also, pets weren't that extremely hard to manage, it was just the first 2 hours which were a pain. At loyalty level 6 you could've kept your pet happy using the meat that dropped from mobs and still have enough meat to make some food or something.Hunters weren't that easy in Vanilla. Keeping your pet fed was pretty costly, you had a throng of pets to choose from, had to tame a lot to level up your skills, ammo was pretty expensive.
Again, we're talking about open world PVE. Also, even if you outlevel an area by one or 2 levels, you'd still have to be careful as fighting 2+ mobs alone would most probably be the end of you.Not -THAT- bad, you can find a group to any dungeon within minutes as a tank.
One dungeon run gives you a level, allowing you to outlevel the ZONE you quest in, making levelling easier.