I think this new one is more about the looks than anything to do with the actual increase in velocity/ballistics.
How many guys that own the standard 22" barreld "S" in 45-70 are actually loading it to balls to the walls/duplicate the 458 loadings??? I suspect it's damn few.
I'm not a 45-70 shooter. I've owned exactly one #1 in 45-70 and only because it was a "S" safety gun, the first I ran across. i traded it off when I found another in a more usable/for me cartridge, 25-06.
So if the vast majority of 45-70 shooters either shoot cast bullets or load DOWN jacketed bullets, this is about what it looks like and nostalgia, which is good a reason for buying a rifle as any.
Nostalga, if I want to shoot something big in 45 caliber I'll take one of the two 1886s in 45-90 out of the closet and bang away.
I do however think they were a good choice from a MARKETING stand point and stand a lot better chance of selling out than a lot of other offerings.
Ross