It figures... I bought a bunch of the original (both 135 and 120) when the discontinuation notice came out; I guess I'll start using it up on just about anything, now that I know I can replace it.
Perhaps. I for one will be a bit more freer burning up more rolls of my frozen stocks. Once I have the new emulsion in hand I will be doing a side-by-side comparison and decide on which performs best and thereby which to use more freely.
For our particular use, there may be a letdown. The history of astrophotography is replete with reformulated films that just did not pan out. I hope to be mistaken here.
In the meantime I've been shooting Ilford Delta 100 and FP4 Plus for fine art photography and have been quite satisfied with the results. These are excellent emulsions for daylight work.
Runners up to Acros would be Kodak TMAX 100 and 400 and Ilford Delta 100. They run quite a bit behind Acros in true speed at 10, 20, and 30 minute exposures, but with perseverance they could be used for astrophotography. None have any advantage spectrally, being mute at Ha wavelengths. If a film has red sensitivity it's an almost sure thing it would flounder in performance, Tech Pan being a rare exception and only when hypersensitized.
Acros, right out of the box, is the best b&w film ever made for astrophotography. Fujifilm recognized this and added this capability to its spec sheet. Only a handful of amateur astrophotographers have successfully used it. In a different era, say the 1980s, it would have been legend - and with no special handling.