No he isn't.
If you need HP for coverage, and you still only have two attacking types? lolol Scizor has no fear of you either way and will rape you in one touch. Ferrothorn sets up free if you have grass/electric. Anything steel will pretty much laught at grass/ice.. etc.
Also, between the fact that it's no longer a TM move, and a lot of the 4th Gen SR setters were now irrelevant suicide leads, and a lot of the major threats in standards this gen resist it, SR won't be the monster it used to be.. so not being weak to it is not that big a deal.
I wanted him to be good when I saw his DW ability, too, but, he's gonna suck.