My .45/70 is really nice too. Smooth action, nice trigger, accurate, and if anything, the polish and bluing are better than my older JM Marlins.
Some of the old timers on marlinowners.com are still steamed up about the takeover, and will forever badmouth "Remlins", but there are more and more reports there from guys who have one, and they have no issues.
The only things I'd be concerned about with those made recently are sharp edges around the loading gate, slightly mismatched wood, and if you get an octagon barrel model, they tend to round off the edges of the flats.
One I bought in 2013, right after the bad ones, was fine except for a butt stock that didn't match. I called Marlin, and they sent out a nice butt stock, no charge.
Another CBA I bought last year that was made in 2016 was also great, except for a sharp loading gate opening. When I had it apart, I softened the edges with emery cloth. To be honest every Marlin, old or new (and every Rossi) I've had, needed some gate edges smoothed up. No big deal.
Last year I handled a .45 Colt Cowboy at a Sportsman's Warehouse in Phoenix. I looked it over with a fine tooth comb, worked the action, tried the trigger.
I could fine nothing wrong with it. I considered buying it, but since I was going back to Montana, ended up buying the .45/70 instead.
A couple months ago I found an older JM Cowboy, like new but made in 1988, for $750, about what the new one at Sportsman's cost.
I can say with certainty the only differences were that the new one had that stupid bar code stamp on the receiver, and the old one will have better resale value because it is a JM. Other than that is was a toss up.
The new one did have better polishing/deeper bluing. The old one did not have a sharp loading gate, but the action was quite stiff, as it hadn't been shot much. I polished the normal areas, and had to take a coil off of the hammer spring and plunger spring as they made the cycling jerky.
The old Cowboy .45 I have now took more effort to cycle than the new one, although internal parts like the locking block were smoother finish than the new ones.