Why would you want greater depth of field in a lens that you got to make the background appear blurrier?
I think because how blurry the background appears isn't just a function of depth of field, and in any event bokeh is not inherently about amount of blur.
Depth of field describes which parts of the subject are considered to appear "in focus" when viewed under the relevant conditions (regarding display size and distance from view to image and assuming average eyesight).
As a general proposition, shallower depth of field is associated with a blurrier background - at least assuming the same focal lengh is used. I believe that as you move to longer focal lengths you can have situations where for a given framing it is easier to get greater depth of field while getting at least as much background blur or more, because the amount of blur is substantially related to the actual aperture (rather than f-stop, which is relative aperture).
However, I also understand that different lens designs can create different amounts of blur at a particualr f-stop / depth of field. Further, better bokeh would mean a better quality of blur, but that does not necesasrily have to mean more blur.
Perhaps greater DOF could be an advantage with an 85 f/1.2, so as to help get more of the subject in focus while still getting great bokeh? (Of course, the amount of your subject which is in focus depends substantially on distance to subject, but for example in a portrait setting it is easy with 85mm to be close enough to the subject that at f/1.2 you are only getting, say, eyes in focus with nose and ears already out of focus. That may be a look you want, but equally it may not be.