I can't speak to the quality of current 336 rifles, but I can attest as to the quality of the 1894s made in 2019.
The fit and finish is quite well executed, without damaged screws, stiff actions, faulty machining, badly fitted wood, or whatever.
Having once vowed never to buy a Remlin, I ended up buying an 1894 Cowboy in .45 Colt.
Internally it was smooth, and appeared to have been subtly re-engineered for the better around the breechface and lifter. I stoned the edge of the extractor a touch and feeding was smooth and easy.
The stock wood was a plain but okay black walnut, darker than older Marlin production, and less glossy.
Accuracy seems very good as long as the velocity of the ammo isn't too slow for the 1:38 inch twist.
American Eagle 225 grain worked well.
The trigger pulls vary. Some are heavy. Some are just right.
I also ended up buying the .44 Magnum and .357 models.
The rear sights seem very tight in their dovetails, so you might need a padded vise to drift them for adjustment.
My advice is to buy one in person after examining it carefully and slowly.
The odd one may have wood not fitted as well, and you might be able to exclude one with a heavy trigger pull.
I believe that you will get quite decent accuracy from the .30-30 models, with their micro-groove rifling.
While I tend to be more of a traditionalist, I very much like the looks of the 336BL.
The 18 1/2" barrel seems appropriate and the big loop is sort of appealing.
The laminated stock is something that I would have to look closely at.