I thought it was excellent
Even more so that it came from Poland. And it was addressed to the world. Including Russia, but they'll never hear it, not all of it, anyway.
As for the controversial statement at the end, it was not an adlib, it was not a gaff. It is how everyone who has a moral code is thinking. It was carefully worded and well delivered, with conviction, passion, anger, and sadness. Dangerous? Yeah. But the situation is dangerous. And I think the walk back by the WH was part of the plan.
Imagine what the former guy would have said on that same stage.