PS has saved my *** from reversals many times; I love this mechanic
That said...be very, very careful using PS when there is lag.
Not only is it very tough to time-up the swoop --- it will sometimes have an improper input, and will treat your transition as a FAKE transition.
Which can end up putting you in a very bad position! And can even get you reversed!
But...little to no lag...PS is a great tactic, especially for preventing reversals.
I do'nt notice the Stamina affect very much but I trust that it's in there
I wish ground transitions cost MORE stamina; and this PS mechanic would be more important for conserving stamina (if you do it correctly of course)