You used NW as an example, Buie averaged over 10 ppg as a FR. Audige started at W&M and averaged 10 as a freshman there, then jumped to NW and averaged 13 ppg as a sophomore. These guys were good from day 1.
Rutgers best players are Omoruyi, who was a big time recruit and started slow, but made a huge jump his 2nd year, and Spencer who transferred in. The rest of their guys are slower developing, but they all play D. Some of Pikiell's early recruits were also good right away as freshman, like Geo Baker and Ron Harper Jr, but he's had quite a bit of success with transfers on top of those.
In basketball, it only takes 1-2 years to know if you have a good player, and 2-3 to know if you have a good coach.