First of all, y'all may recall I hate the Yankees, but if I were them, I'd stay miles away from Corbin. If they sign him, just hand him the Sonny Gray jersey; no need to make a new one for the same good-not-great-coming-off-career-year-in-small-market guy.
As for Harper and Machado, both made any team much better, no question, but are you dying to give 250-300+ to guys who have been notorious non-hustlers and at times, head cases (not to mention with Harper, wildly inconsistent)? Guys like Cano and Cespedes had been accused of mailing it in before they got their payday, and both contracts now seem dumb. Do you want to be locked into one of these guys for so much money/so many years?
Corbin was legit by all advanced metrics and the yanks are desperate for multiple rotation upgrades and he's the second best on market (best if kershaw is not realistic). That said the AL east is a tough assignment and my expectations would be lowered - but I'd be happy to welcome him in to the fold. Gray is a total mess right now, no idea what went wrong with him. One of the bigger reasons I think the yankee pitching development/coaching staff needs to take more blame in recent years. But he's not a reason to stop trying to get better there.
Sure he seems arrogant or whatever but Harper hustles too much if anything - not sure what you're talking about there. He's had a bunch of injuries already and needs to tone it down a bit imo to protect himself. No comparison to Machado who openly said that hustling isn't his "cup of tea" and buster olney has already reported that it's turned off some potential suitors a bit. Still, Machado is such a monster in all phases of the game you need to put emotion to the side and take good with the bad. I just think Harper's bat is so special especially as a lefty in YS that I prefer to maneuver some of the defense around to accommodate him over machado who on paper seems like the more logical fit. I'd put short term defensive alignment concerns aside when we are talking about a decade long plus contact in all likelihood.
Harper has been inconsistent in some ways, but in the major ways game (power, patience, defense) he has been pretty rock solid.
Both guys are such a unique combination of age, experience and talent it's crazy they are both available at the same time.