It's not that the team has "too many flaws" it's the fact you need a decent farm system to keep pumping out prospects in order to keep being successful and they're dangerously close to being a bottom 10 farm system. Once Devers comes up they might have the worst or close to it. Right now the Sox need help on the corners. Pitching is fine. Middle of the order bat will be solved at 1st or 3rd.
They were certainly a bottom third of the league system before the draft and IFA signing period. They're comfortably middle of the pack now. And unless they don't make a trade and just end up calling Devers up in early August, their ranking will stay in that range over the winter. If that's the case, by the time he does graduate next season, advancements from within along with next year's draft and IFA period should keep them from slipping back that far.
They did a really good job of filling out the system again, and even plunked a bunch of interesting talent in rounds 11-40 to max bonuses (125k), a couple just over (140k) and one at 172k, so they may even have a name or two from that group hit the radar by then.
This was a really good couple of months for infusing talent into a depleted system. They've added 11 names to the soxprospects.com top 60.
Tanner Houck (5), Daniel Flores (7), Cole Brannen (14), Alex Scherff (15), Jake Thompson (18), Danny Diaz (22), Brett Netzer (32), Zach Schellenger (33), Antoni Flores (40), Tyler Esplin (56) and Aaron Perry (58).
If they are really considering acquiring a guy who would be moving to a new position, I'd rather it be Cozart who is fantastic in the field and breaking out offensively.
Cozart will be expensive and I'm not sure how much of his season line is sustainable. Since June 1st he's been league average offensively with a decent ISO. His ISO in that span would still be better than anyone currently on the roster not named Mookie, but I'm not sure I'd want to pay for the 142 wRC+ and .236 ISO. He wouldn't be any worse than Frazier would have been for the club, but he won't be as cheap as Frazier would have been (solo), either.
Side note: Chris Sale currently has the highest ISO on the Red Sox roster this year. Tiny samples are fun.