anything is controversial.
I suppose the end all be all of evaluating pitching development is when they make it to the bigs, I won't disagree with that but I don't fully endorse that either. Let me provide an analogy, lets say you weigh 280 lbs, and you want to get down to your highschool wrestling weigh of 160. Lets say after 2 years you're down to 195, about 15% body fat, very close to you goal but not there yet. You didn't hit your goal, but you're well on your way, so it's fair to say that you made some real changes in your life with positive outcomes.
As Moon pointed out, Drohans last few starts have been much better. We've all seen how a few bad performances can skew numbers in a SSS, also, we never know what a guy is working on. A team can be telling him to throw a certain pitch more even in counts he wouldn't normally use it in. There's a lot more to look at than just results. Personally, I'm not terribly high on Droha, I'm more high on Perales because I have an aversion to risk when it comes to prospects. I'll bet on upside anyday of the week, and he just might have the best upside of anyone in our system. The nature of those guys is their value is always going to be very low until the reach the upper minors, as a matter of fact if you look at all the trades in baseball the last few years you've seen this seismic shift to such players. Team, more and more, want talent that is close to MLB ready, devaluing guys like Perales.
I'm not opposed to trading him in the right deal, but to me, you trade to add to a good team to build sustainability, not to shoot for the moon one or two seasons. Because if you do the later, and you don't win a world series, then we are right back to 2020 again. I don't want to be there. I'd be more open to trading position player prospects, because we have more depth there.
Also, I try to weigh every way to build an MLB roster. TRADES/DEVELOP YOUR OWN GUYS/FREE AGENT SIGNINGS. I believe there is a time and place for all three of those. It makes sense to throw out the $300 million dollar contract some years while other years it does not. Same thing with trades. So when you've built the farm system back up to good (but not great) and the team has a nice core coming up but isn't quite that good yet (we have a winning record) selling off your chips seems like blowing your load to soon. But that's not my main motivator for these feelings. It's the fact that next years free agent class strength is what our weakness is. So this goes back to the timing of everything. That timing also coincides with a year in which the Sox just reset the luxury tax. It makes all the sense in the world (to me), to sign one or two of Ohtani/Yama/Urias/Gioloto/Nola. Those guys only cost you money, similar to money you'd have to give to any guy taking an extension and costs you zero prospects.
I don't disagree with your logic overall, it's just a strategy I would personally not employ over here on my armchair.