Sorry if this is the wrong place BUTTTTT

I am currently 63 and 5/6ths, and almost done with all of terrokar. I have completed all of zangar and hellfire, and done both instance from the 2 zones (that fit my level). I am just wondering, because normally I would be 63-64 when I START terrokar, but now I am just hitting 64. I think I am a bit behind, so I was wondering how the rest of you did it, and what you think of my idea.

My current plan is to continue like I am, slightly low level for the zone (@least by my personal standards) and when I finish all the possible zones, if I am not 70, I will just instance grind to get 70. Most people seem to suggest I grind instances now, but I saw why not do it at 68-70 when I am doing instances that give me good loot, rather than level 63 loot. I do plan to do all instances once though, while leveling (instance quests and for the experience.)

So what do you suggest, and what do you think of my plan? (stick it out, be slightly behind the curve, and just farm instances/rep/gear @ 68-69 IF I don't get 70 from quests.)