The latest patches seem to have pet agro... working, at least. Granted very low level, but my level 4 water pet was able to keep agro on a mob through at least 3 nukes, and then me sitting.

I don't remember perma-rooting on Classic, ever. They may not be nuking as much as they should, but it was never perma-root.

Pet aggro has definitely been fixed. Noticing at the high end I can cast 3x dots before a mob starts running to me which feels about right (i did a boatload of research on the subject).

Yeah feels right for enchanters too.