I am SO GLAD they didn't go with the five super soldiers common enemy bullshit.
So fucking glad.
Mind you, Russos would have nailed a final fight scene with what is essentially five Bucky's vs. Cap, Tony, and Bucky, anyway.
I actually really liked Zemo in this. He was significantly different from any villain we've seen before. No power, no ability to actually challenge the great and mighty Avengers aside from one gift: his patience and drive. He's just a regular guy with powerful motivations to bring the Avengers to its knees. He was exactly the right villain to bring together a contained climax as opposed to a world-ending plan. All he wanted was to rip the team apart, and he honestly did succeed.
I like how Zemo had already planned to kill himself after his plan was finished. He was driven to do only that, and once it was completed, he had nothing left for himself. He was 100% functioning only on his hatred of the Avengers and his vengeance.
Can we say Zemo won? Yeah, he did. But not fully. The Avengers will come back together, and Tony will get over himself. But he crippled them severely, that can't be denied.