I updated this post on haste macros. I realized I still wasn’t using any of my haste procs in Feral form, so I decided to toss them on my Mangle. This means I’ll be using it a lot more in PvP and it probably won’t be available when tossing Roots, but I think I’d rather use it on a Mangle anyway.
If I’m using Mangle to just get a snare on someone I’m trying to run from, it’ll let me switch back to Travel Form a wee bit faster. If I’m using it to try to down someone, obviously it’ll help. I’ve found that Mangle’ing a snare and running has a much higher chance of success than Rooting and running (due to Root having an eternally long cast time when someone is pounding on you, even with both haste procs). About the only time I try to Root is to get someone off of a Flag Carrier.