The first one basically happened once in the 80's(could've happened a few other times), the 2nd one almost always happened in the 80's, and everyone loves the 80's.
It's an issue of one size having to fit all. That's the reason the previous western conference had 2 divisions than spanned 3 time zones. Something no eastern team would ever put up with. The East was perfect, the West was broken. The league then tried to fix it, by evening out some of the problems, but the solution looks weird. There's no reason the East and West must look the same. As we've seen, from at least 1994, and probably from the 1981 realignment, the league has forced every team into the same mold. That's the reason divisional playoffs in the 80's ever existed. Detroit and Toronto were in what was the western conference, even though they're clearly eastern teams, and always have been.
1-16 would be the best, but fat chance eastern teams ever agree to that again. If the Rangers and Islanders are #1 and #2, and the Flyers and Ducks are 15th and 16th, it would be, why does the #1 have to go all the way across the country?