Shear uses two axis now, setting X/Y only worked for 2D screen space shear.

Should be made to work still.

ye, i know - shear work in front, right, left, top, bottom view (ortho), but keys X/Y just don't working, like in blender 2.79.5 and older versions (2.78-2.77)

@Alex (Paladinqp): Right - what @Campbell Barton (campbellbarton) is saying here, is that Shear now works differently. Before, Shear would always shear relative to the screen X/Y. This meant that you had to be very careful about how you would orient your viewport, because the viewport direction was used. Now, Shear uses the proper orientation set by the user, which can be View, Global, Local or whatever. This change has broken the ability to use the X or Y keys, but it could be added to the new way shear works.

ок, mayby just need add

and please create video tutorial and add to blender manual how use Shear tool and new features with using custom user orientation and View, Global, Local, Normal orientations