Clearly I cannot speak for everyone, but
I think everyone would agree it is nice to see the 321 back. It is a movement from a legendary watch.
I think most people would agree that it should only live in a proper re-creation, rather than some fanciful LE with medals, dogs, badges or other stuff on the dial. For me the only allowable adornment should be a crystal back so that you can see the 321 inside.
But
Given that the 321 is not a technical improvement over later movements, and given Omega's hype about it, I think there is a certain level of
Scepticism that the new movement will be too expensive, the press guff massivley talks up the effort to re-create it, paving the way for massive price.
Irritation that it will end up being so, given that originally it was no such thing
Apprehension that it may end up in the wrong watch
and from me
Annoyance that Omega's press has cut Lemania out of their part of the development of this movement.
So this is not bad news, not at all.
However, there are reservations to be had, it may not be all good news either.
Dave