I thought it was good, really good but not a 5. At best a 4 for me. Chris Evans and Scarlett Johansson are really good but i thought rest were kinda forgettable. Winter Soldier was to faceless with too little time to actually develop, most of the scenes with Bucky were there for Steve to get characterization and the other villain (i probably shouldn't reveal) were too two dimensional and a bit boring. And Rumlow, who was only there too give Sharon (another forgettable character) and Falcon (whom i liked) a adversary and too set him up for later.
And it felt like it was a bit too long which is probably because of the big cast and the Russo brothers TV mentally to give every character something to do, which is a blessing and a curse. But I agree with your other points. It's unique among the other MCU movies where it felt like it was its own beast and not by the Marvel machine, which has been my biggest complaint against the MCU. Also those fight scenes with Batroc and Winter Soldier were just fantastic. I could watch them all the time.