many of them seems to be quality of life for tank in dungeon (aoe blood drain, aoe proc healing, front position, etc)
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The one thing I was most curious about is if this meant it'd be easier to get the mounts for non-savage raiders. Especially the skyslipper, which is one I've always wanted. I don't do savage raiding but I do BLU
The E4S mount is easy to get these days. We outgear the fight unsynced now in 630-640+ ilvl gear, the boss dies before phase 2 and there's only a couple of mechanics to watch out for.
You can watch the first 5 minutes of Joonbob's E4S guide for a quick idea (mostly the colored shapes) but it isn't too dangerous. Solo tank is fine, solo healer if they know what they're doing.
If you give it a few pulls in Party Finder "mount farm" etc. you can beat the fight pretty quick.