The text I saw was for the formation of a jointly (US/UA) owned entity which would decide how to reinvest 50% of the profits from UA State owned minerals/related infrastructure.
Unless "reinvest" means "give to US", I don't see this point happening.
> 2. It puts Americans on the ground in Ukraine in a non-military capacity. This introduces a new diplomatic dimension, as attacking or occupying land with significant American presence is not desirable.
In what way? we're not talking about any US State investment, and any US private investment would be crazy, given the war and possibility of future war. No one would invest there.
> 3. It provides money for an investment fund for rebuilding Ukraine.
It's money that exists anyway, only now it's in a fund jointly controlled by US/UA rather than being controlled only by UA.