A) Only states that were very close would need to be recounted (which is very similar to the way it is now)
B) Even if it is more difficult, it's worth it because the election would be more fair! Which would you rather have - an easy election where some people's votes count more than others? Or a difficult, thorough election where everyone's vote counts equally? I am in favor of making elections fair at any cost.
If you thought this through, then by all means, share that reasoning with us! I haven't seen any of it yet.