I've been prepping myself for several weeks to learn all the intricacies of leveling through Pandaria (mostly focusing on The Jade Forest since getting out of there ASAP is KEY. A little bit about me.
I'm a rogue (not exactly an ideal class for solo questing, but I've got the legendary daggers, and am pretty competent about cooldown management (making big massive pulls every three seconds or so by popping evasion, using Killing Spree and Adrenaline Rush to cleave mobs down before Evasion goes away.
I've got all of the necessary preparations done: Dailies, Potions, Flasks, Food, spare enchant scrolls, etc.
A Paladin guildmate of mine (who was 17 minutes from the realm first on our server, I wasn't playing then) has offered to quest alongside me. He does the pulling, I do the killing. The difference is that he has no experience on the beta, but he's definitely a sturdier class capable of helping me push through some of the harder sections like Townlong and Wastes.
Do the disadvantages of going in a group outweigh its advantages? Would he slow me down since rogues are kings in indoor areas with all of their speed buffs? Just need a few suggestions to come back to while I nap in preparation for launch.