That it needs energy to keep running is realistic. Fallout Universe did not learn how to develop dependable renewable energy (which is what caused the Great War) and something like this should need a generator or some kind of batteries to run. So I'd call addition of Fusion Cores a fix long overdue.
Power Armor being a vehicle also looks fitting to me as it was described as such several times. How cumbersome or easy to use it will be remains to be seen: few leaks mean nothing as we don't know if players get used to it over time or if the PA was just not to the player's tastes.
That you can't wear that damn heavy thing in your backpack is also a fix long overdue (though I still hope have some feature that makes the armor return to a base).
That you can't fast travel is probably the result of bad programming (game enters a different mode so you can't use all features).
"They are removing weapon maintenance, noes! They are adding PA maintenance, noes!"
With all due respect, you sounds like you are putting the "They are dumbing down for CoD crowd" on whichever criticism you can find
The trailers showed the player call and operate a Vertibird so hopefully you can store it there.
The army designed it to be used in armies. Lore-wise, the PA were used in overwhelming groups (by BoS) or as a support to regular troops (NCR and everyone else). For loners, whom we play in FO, it should not be as convenient to always rely on PA.