You can get a whole lot of training in 2 years. But Ukraine is expertly adapting the doctrine to their situation and constraints. Hopefully NATO countries can debrief with Ukrainian soldiers after the war to get improvements and feedback from them too.
I mean, Ukraine did get a lot of NATO strategy training and the Ukranian military leaders probably also get some access to US spy satelite photos.
But the idea to invade russia and how to execute it was probably still done by Ukranians in Ukraine.
You can get a whole lot of training in 2 years. But Ukraine is expertly adapting the doctrine to their situation and constraints. Hopefully NATO countries can debrief with Ukrainian soldiers after the war to get improvements and feedback from them too.