After doing the first Heroic 4 on Makeb last night, I completely agree with the OP on this. For every mob, I was stunned, rooted, and pulled constantly. It was a bit ridiculous. If I started with saber throw to build focus, then I was stunned and rooted while the DPS and heals were getting aggro. So I started just leaping in and mass taunting. It worked a little better for me, but I was still stunned, rooted, pushed, and pulled so much that holding aggro was a chore. Unremitting would have gone a LONG way in making the pulls cleaner.