It varies by character design and what the client wants. MFT's older figures were mega detailed with little to no articulation, but the recent trend has been towards articulated figs, and I think they've done a good job keeping detail while adding the almost-expected articulation points.
This is an example of their older style, favoring detail over joints:
Real-world designs can have a lot of articulation and it tends to blend into the "busy" sculpt, like this:
It'll be more obvious on cartoonier designs of course:
They're going to be making the 6-inch DC Comic figures from now on, taking over for Mattel's cartoony representations. I hope they go with something like the Mortal Kombat figures, something for more adult collectors, not so much for kids.
Of course, DC Comics might say, hey, we want more cartoony designs, in which case cripes, what a waste of MFT's potential.