This is an obvious no veto, no matter what kind of league. That deal's pretty close to as even as you can get considering Espinosa has been as good or better than Kinsler and Nolasco isn't on a pitch count and could easily outproduce Zimmermann in the counting stats as a result. If anything, I'd say the side you're over-favoring (IK/Zimm) is actually the weaker side of the deal ...
And honestly, drunk or not the deal got made. Intoxication is/has never been an acceptable excuse for any fantasy league in which I've played, and on top of the fact that stories stemming from this reason are hard to prove, what's the point? This isn't a court of law - you don't have to prove the difference between involuntary or voluntary - he made a decision, and his state of mind should have nothing to do with anything in terms of a fantasy league.
Just my $0.02
100% Agreed. J-Zim is pretty much done being a factor this season, and Kinsler hasn't been particularly good whereas Espinosa has been very, very good. Honestly in a redraft I'd probably take the Espinosa/Nolasco side. Kinsler might have a better 2nd half, but Nolasco's going to be pitching all year.
Just the fact that you can make a reasonable case for the other side means this isn't a lopsided trade. "Lopsided" means it's not even a question, like Adrian Gonzalez for Brett Wallace. That's "lopsided."