I still think that this compound would be worth exploring. Dopamine is a full dopamine agonist (D1,D2,D3,D4) and this is what I found about D1 agonists:
"D1-selective full agonists like SKF-81297 and 6-Br-APB produce characteristic anorectic effects, hyperactivity and self-administration in animals, with a similar but not identical profile to that of dopaminergic stimulants such as amphetamine"
Dopamine would also probably be somewhat like pramipexole with the D2/D3 agonism.
Say the diacetyl-dopamine does cross the BBB and gets deacetylated (I think a good bit of it should), I would think the dopamine should just be able to flood over the receptors (although it probably won't last long due to MAO, COMT, DAT).