You make a lot of assumptions in your article.
Some things to consider are that the conditional pick has not been identified, and that Dumba is going to be a free agent after this season, which do affect his value in this equation. Teams certainly are interested, I am certain many were, but McPhee has said all along the value he'd get in protection deals must exceed what he would gain from other suitors. So whatever the end result is, is it a bad trade if the value was driven by the market?
Also, of the picks he has accrued, we knew going in that some would be futures, in order to ensure the first few drafts were positioned to load the organizational depth. This is undoubtedly one of those.
Anyway, it's all well and good to post up a blog calling a trade "bad." I mean we all have our opinions. But I think it's wise to wait and see how things shake out. Fact is we never know with prospects. And getting a top prospect is never easy, particularly one who possesses power forward ability along with plus hands. And lastly while Haula is nothing special, he is the type of young player a roster needs for right now, on top of the futures consideration of pick + prospect.
I'm going to withhold judgment for now on not only this trade, but also the others that include the prospects. Because those guys are hit and miss just like picks.