The only problem with Cycle A is that it works so well until Obama comes along. The Carter-Bush and the Obama-Reagan comparisons also work well. Hillary looks pretty unstoppable now and I don't see a Republican winning in 2016. I don't see another recession happening between 2017-2021 (since we just recovered from one), although the 2016 winner could lose in 2020 for other reasons. Obama could be a Nixon "done right" though.
If Obama were Nixon "done right", wouldn't he have swept to landslide re-election against, like, Rick Santorum or Ron Paul or something?
These cycles are pointless and ultimately untestable. Apparently, the cycle's only occurred twice, so what are we to make of the pre-Hoover or post-Obama eras? If it's not continuous, proving the cycle happened twice and not again makes it not a cycle. Pointlessness all around.