We don't need Yandle, and we don't need to reinvent the wheel here.
The D is fine once McD returns in 2 weeks or so. We'll have 7 solid dmen as Hunwick has proven to be a solid 3rd pair type dman. We'll have a PP guy in Boyle. McD obviously adds O from the backline as well. More defensive guys like Staal, Girardi, and Klein. And two decent 6th dman options in Moore and Hunwick. Our D is fine.
We need a top 9 forward, that's it IMO. Be it a C so we can move Hayes to the wing, or if we can't get a good top 9 C add a good top 9 winger and hope Hayes improves on faceoffs, which I am sure he will.
If we add a top 9 forward that would enable us to have a 4th line that is based around Stemp and Moore, which is solid. Then fill the 3rd spot with Glass, Fast, Miller (hopefully not Glass...but AV loves him so it may be him).
If you give us a solid top 9 forward I really think we'd be in fine shape. Hayes and Hags are good 3rd line guys. Add another solid top 9 forward to that mix and we're good.
I also think in the short term until we hopefully add another top 9 forward, I would bring Miller up as a winger and play him with Hags and Hayes on the 3rd line and see if that line plays well. Miller is better suited as a winger IMO, as stated in the other thread.
Bigger picture, add a top 9 forward (C or W) and I think we'll be fine...I really do. That would make us deep again and give us the balanced scoring we need and thrived on in the playoffs last season.