Remember that as recently as 2012, people were saying the EC favored Democrats. This could easily be the case in 10 years when states like AZ and GA become D - leaning, and Texas is a tossup.
Yes, the EC has recently favored Democrats and that will in all likelihood be even more so the case (in a lopsided manner) going forward imo.
What do you envision here? Are you thinking of something like this becoming normal?
Yes - though, not quite so dramatically. For instance I would clearly take issue with OR / NJ turning "blue" nor KS going red. However the south could be a plausible ground for surprise gains in the dem party, swinging away from the GOP like thus. Again though, the EC count would slowly go obsolete under an NPV system, though inevitably there will be a few straggling #contrarian analysts studying how the results would have turned out with WTA and who "benefited" from this change, etc. of course, as always.