Dombrowski did have a great draft last year, but he realy hasn't built great farm systems since he was in Florida and had perennial top 5 picks. Granted, it's not a given to get a good farm system that way, but it does make things easier.
Right now, the Sox don't really have a great farm system top to bottom. Devers has been scouted to varying degrees by various agencies. Keith Law, for example, loves him. BA not so much. We shall see what it holds. Groome, Chatham and Dalbec are in the top ten, but really all were drafted in 2016 and there will be attrition as one or more of them simply don't pan out. No one seems to like Ball, although drafting him did allow the Sox to sign Longhi, so hopefully one of them works out.
Really, how many guys in the top ten do you expect to make the majors? Or become viable trade bait a la Moncada/Dubon/Kopech/etc. in the next 2 or 3 years?
This system won't be very good. It does happen, and replenishing it isn't as easy as many want to believe.
The biggest problem I had with Cherington is he didn't like to deal any prospects. Dombrowski is the polar opposite, dealing as many as possible (justifying his reputation). While I like this team, I also like a nice balance between the two extremes. Prospects right now are not worth what they were in trades 2 years ago, and this will handicap the Sox ability going forward just as much as not having a pipeline of players....