Every year there seems to be a wishful thinking idea or two by our fanbase, likely every fanbase.
Last year it was ''Smith was signed to be the 7th defenseman!''. I said at best Smith may be the 7th defenseman by the end of the season, but he's gonna be an every night player when the season starts. And he pretty much was until about the trade deadline or so. He did get scratched a couple of times before the deadline, with the first being I think in late November/early December, but it didn't start becoming a regular thing until after that.
This year's version of that is people wanting Miller waived (so Nemec can stay up) and implying there's any chance of that actually happening.
Miller is not a bad defenseman (seems to be a good bottom pairing guy) despite a bad game or two in the preseason, but even if he were, I think it would take quite a bit of suckage to get him waived.
Nemec is likely ready to be able to play in the NHL, but to what extent and how much? I think that's unknown. I don't think they wanted him up being a healthy scratch regularly, like what happened with Holtz for several months last year, and I don't think any of us want that to happen either. Not even the people who super strongly believe he should be on the team right now. If he were to have started the roster on the team, I doubt he would be in the lineup every night. So it's better that he's back to the AHL, at least until he's needed and ready to play every night, on top of all that.