I utterly loved it - it was up there with Iron Man 1, maybe even The Avengers.
One thing, were all three helicarriers totally destroyed ? I know they were downed, but the one that hit the Triskelion didn't seem totalled.
Was one (or even two) salvageable ?
No. The first one was blown in two, smashed into the launch base taking both out.
The second was being crushed against the building and once the building collapsed, would completely come down on top of it crushing it fully, or exploding it's power plant.
The third exploded mostly in the air as Cap fell from it, what was left would have scattered badly on impact.
Black Widow refers to it all as one big pile of wreckage afterwards.