I noticed some glitches in the AC plug for Maxwell: (i tried on PC: AC 21, not tested on 20)
When setting a 2 point perspective in AC - this view setting is not transferd to Maxwell - the view is as if this setting was not set (I am aware of shift percentage options, but it would be better if this quick option worked)
The other thing is - that the "Apply Render safe frame" is ignored when transering to Maxwell and the view is transfered the awkward way:
if the view proportions are different than the render ones: Maxwell gets the longer side of a view as a longer side or render, but when having the safeframe on the user expects that the gereyed parts will be removed and they are not (image is covering bigger part then expected): the workaround is to undock the 3d view and set its propositions as in render settings.
The second one may be treated as a "feature" but the first one is a bug IMHO.
(using 4.1.4 version of the plug)