I've talked with someone who has hiked up the Wildcat Ridge Trail from rte 16 in winter and it was very, very challenging, requiring a number of changes from snowshoes to crampons and back again. And it took a looong time.
Last February I hiked up 19MB and then up WRT with a group. WRT had not been broken out at all up to A peak. The slide was a non-issue; it was all snow. I think it's more of a problem when there have been lots of thaws and freezes turning it into a sheet of ice.
I've heard of a couple of groups, and I think it may be a trend, who ascend via the Polecat ski trail, traverse over to A peak and then retrace their steps. It avoids the steep, strenuous ends of Wildcat Ridge and is probably the safest way to do it (particularly if you're solo).