I certainly agree that I wouldn't do Stroman/Sanchez + Hutchison for Samardzija, but I think being practical about it we have:
Dickey - pitching like a #3, at best a #2 from what we've seen this year/last year
Buerhle - pitching like a #1, I'd expect him to regress to a #2/3 as he has been over his career
Hutchison - Happy with him pitching like a #3. Has been both fantastic and less than stellar.
Happ - solid #5.
Stroman - I hope he continues to pitch like he does, but still the most I'd expect out of him is to hold the #4 spot. Keep in mind he has only started 2 games, and will falter at some point this year.
Morrow - lets see what he can do when he comes back.
Who of those 5 can you expect to pitch in a playoff series? You ideally want 3 solid starters going into the playoffs. Buerhle for sure, maybe Dickey, maybe Hutchison, unlikely Stroman, definitely not Happ. Consider the Tigers have Verlander, Sanchez and Scherzer...
I wonder what we would have to give up to get Cliff Lee... though his contract might be too much for the Jays to eat with Romero in the minors. I wouldn't target Samardzija, too expensive... I doubt the Rays trade Price within the division... I wonder who else is out there...