Here is something I posted on another thread that addresses this comprehensively.
Recruiting needs to always be evaluated in context of roster needs. If everyone who SHOULD return does return (everyone but Williams, Trocha, and Wilson), there isn't an absolutely critical need left in the 2018 class since Nebo is coming in to backfill for Trocha/Williams and Jasey and Walker are waiting in the wings.
That all being said, there are a couple important needs that we must fill in 2018 or 2019 recruiting class or else the '19/20 team is in MAJOR trouble.
Need #1: high quality big man. True center to replace Davis after next season. Maybe Jasey as an acceptable stop-gap until the guy is ready to take over but he MUST be added by '19.
Need #2: TWO good outside shooters, whether guards, small forwards or stretch 4s. Absolutely must land at least two good outside shooters to replace Gilder and Hogg after next year. Maybe Jones is one of those guys and maybe one of the fish becomes a quality outside shooter, but the safest bet is always to recruit guys like Hogg and Gilder who are already good players and great shooters.
Need #3: one guard (either PG or SG). Can be a bit of a development project if landed in '18, needs to be as game ready as the current fish if landed in '19. Maybe Sahvir Wheeler is that guy, I haven't seen an update on him in quite some time.
Overall, between Flagg, Caldwell, Chandler, Starks, and Jones, we have a great base to build on at the 1-3 spots. 4 and 5 spots start getting iffy after this season, get iffier after next season, and get downright scary after the following season.
2018/2019:
PG: Caldwell
PG/SG: Starks
SG: Gilder, Chandler
SG/SF: Jones
SF: Flagg
SF/PF: Hogg
PF: Nebo, Walker (expect to see a good amount of Hogg playing 4)
C: Davis, Jasey
Room for two more in total.
2019/2020:
PG: Caldwell/Wheeler
PG/SG: Starks
SG: Chandler
SG/SF: Jones
SF: Flagg
PF: Nebo, Walker
C: Jasey
Room for four more in total
2020/2021:
PG: Caldwell/Wheeler
PG/SG: Starks
SG/SF: Jones
SF: Flagg
PF: Walker
C: Jasey
Room for 6 more in total.
2021/2022:
PG: Wheeler
PG/SG:
SG/SF: Jones
SF:
PF: Walker
C:
Room for errrrbody.