I'm not trying to be harsh.
To put it in to perspective, if we are talking lottery PG's, PP100 / PPFGA splits.....so a measure typically of volume and efficiency:
Curry - 46.9 / 1.42
Lillard - 42.2 / 1.59
Young - 40.4 / 1.42
Walker - 38.4 / 1.31
Sexton - 36.5 / 1.44
Irving - 36.1 / 1.84
Fultz - 35.7 / 1.32
Russell - 34.4 / 1.31
Burke - 32.9 / 1.30
Fox - 30.4 / 1.35
Knight - 29.1 / 1.28
Dunn - 28.5 / 1.32
Rose - 28.4 / 1.37
Westbrook - 22.6 / 1.27
Ball - 22.4 / 1.53
So, it should be relatively easy to see why there is more concern with him IMO. If you land in that 34+ zone......just from a scoring volume perspective, the only top 10 PG to flame out was Jimmer. The hit rate is just really high on guys that get in to that ++ scoring category as higher picks. A notch down from that, there are just a lot of mixed results, especially when you get in to the back of the lottery. PG is just such a competitive position at the NBA level. Calling him "fine" isn't meant to be harsh, it just is what he is. He doesn't enter in to the statistical tier of players you would like, to justify taking a PG that high....just given how the position has evolved. Rose and Westbrook had lesser statistical profiles, but were also generational athletes, which obviously helped propel them at the NBA level. If Dotson is that kind of athlete (I don't see evidence he is), I'd have a different opinion on him.
I'm just of the opinion I'd rather take a swing on a more scarce position than draft a PG like Dotson. I don't know that you regret a quality player at the end of the lottery, I just think there's a glut of PG's right now and you are better served investing elsewhere.......even if the success rate is potentially lower. The metrics I look at spit him out in the range of guys like Okoro, Green, Achiuwa, etc.....I'd just much rather gamble on those types. Can you take him in the lottery? Sure.....and I think he makes sense for a team ready to make the playoffs, as a potentially reliable contributor, I just think his ceiling is lower for a lotto pick.....and lower ceiling PG's are a relatively cheap commodity to acquire. I think he's someone that makes more sense in the 20's, when upside outcomes become way less certain.