I'm of two minds on this. On the one hand, splitting up big states until we have 545 states with Wyoming-sized populations — so the Senate is finally geographically representative, large states aren't underrepresented in the Electoral College, House districts no longer vary widely in population size, and residents of currently-large states have state governments where their voices matter more — would be great. But what you really want to do is maintain the 50 number and just rearrange the borders so all the states are equal in population. Urban planner/artist Neil Freeman drew a great map of what that would look like:
"States could be redistricted after each census - just like House seats are distributed now," Freeman writes. He's probably, joking but this Adirondack native thinks there are much worse ideas.