I like the regular MOE, not the CTR (although I don't have a problem with the CTR). My M4's aren't Sniper rifles, the stock wiggle doesn't bother me a bit. Once I have it shouldered, I've never noticed the wiggle.
I don't attach my slings to the stock, I attach them to the rear of the receiver, so the lack of attachment points isn't an issue for me.
I really like the idea of having the sling forward of the stock.
I've used the older "traditional" setup for years but never liked how the sling occasionally interferes with getting a good shoulder mount.
Ironically I've been looking at some of the attachments for that method of attachment. Seems like the ones with greater range of motion would be best.
I used to use the regular MOE but I can't stand that wiggle you refer to.
The new MOE SL costs almost exactly the same as the MOE but completely does away with the wiggle.