Is the suggestion to use the snow slope instead of the switchback at this time of year?
Or is there BOTH a snow slope and switchbacks?
I'll be heading up in a couple of weeks and am checking here everyday for the latest info.
Also, any suggestions for the best route map, if there is even a need?
The snow slope is the way to go. The switchbacks are filled with snow, which is covered with a layer of ice, at an outsloped angle. Not impossible, but not fun nor easy to travel. The slope is the way to go until there is more meltout.
So, no, there is really only one way.
My opinion of the best route map is "Whitney Zone" by Tom Harrison maps. Many backpacking stores sell these, and I believe they are available at the Whitney Store. If you are very familiar with the terrain of this trail (read: you've hiked the mountain), you could skip a topo map.
http://www.tomharrisonmaps.com/locationmap.html