Should WotC support more than one edition at the same time? Or will this just make the problem worse?
That could mean supporting 4e and 3.x (or your old edition of choice) simultaneously. Or it could mean that Fifth Edition actually has a 5a and a 5b. Maybe one that caters to complex tactical combat rules, and one that favors a stripped-down approach.
They wont do that. I dont think they CAN do that. One uses the OGL, the other the GSL. Two very different licenses.
Further, the two systems are radically different- the edition wars, that have died down, still smolder and frankly I dont think they cna bridge the bad blood. Part of which stems directly from them.
Further, what do you mean support? What is there left for them to do in 3.5 to support?