Yes, its gone. All animals leave multiple stacks when being butchered.
Even with the change, though, at most one-half of bones get used. That gets annoying if you're relying on bones as construction material.
I have to agree here:
Since 4.h bones and butchery are massively bugged. If there was any bone simplification planned, it didn't work at all, about 50% of the bones still carry creature type or creature name in their item name, and those clean 'bone' type items do not stack as construction material in menus... so it looks like:
bone table 4
bone table 2
frog men bone table 3
bone table 1
frog men bone table 1
when trying to construct a table.
But that is not even the main issue. As other have reported before, butchery ends in almost eternal loops, rebutchering it's own products, massively stalling everything. Hexxedgarish (4g) had 3 butcher workshops for most of the times, endless dead creatures and still the butchers somehow kept up. Becordorbar now has way less kills per season, 4 butcher workshops, but the stockpile is completely overflowing with skeletons etc, as the butchers are more busy reprocessing their own products...