Along with unbalanced deals.
Who are we to guess what a 'balanced deal' is? Imagine if you're the guy who took over a Pipeline team and had Josh Hamilton (a highly polarizing player) on your team. You don't like him and want to trade him for anything. So you strike up a deal with the Daniel Nava owner. We all get to veto it because Josh Hamilton is a top40 preseason player based on the ESPNYahooCBS garbage rankings?
Meanwhile, the trade is vetoed and Daniel Nava puts up 2700pts while Hamilton barely break 1600...
You people would have vetoed the Cowboy's Herschel Walker trade for the Vikings because he was a big name. All the Cowboys got out of it was a couple journeymen and some guy named Emmitt Smith? Nope, that's an unbalanced deal!
Let managers manage their own teams as long as they have a justification for why it makes their team better.