No doubt that next years team is going to look a whole lot different than the last two years. Here's my rundown, with the caveat that I could be completely wrong (I remember telling my son that I didn't expect much from Chima because you usually don't red-shirt a juco transfer...you bring them in to contribute right away. Not my best prediction).
As for impact players, I think part of the impact equation is available minutes. With only one true interior player returning, Neufeld (who is very foul-prone), one returnee who didn't play much at all, Underwood (hoping he gets his game going this year), and one VERY undersized player, Printup (does he move to his natural wing position?), there are a lot of minutes available there. So, I think we'll see Koehler and Johnson on the floor quite a bit. Both will be Juniors, so they've already had time at the college level (though they still have to transition to D1 speed/size), and judging by their videos, it does look like they both have the skill sets to contribute right away. Koehler has good range, good size at 6'8", and put up 22 double-doubles last year for a good juco program. Johnson is a bit smaller, 6'5", but has a nice mid-range game and again put up good numbers on a juco team with a lot of D1 talent. I read an article in March that said he was still coming to UCD, so hopefully the lack of a press release is not a telling sign.
Guessing that the freshman interior players, Murphy and Gehrke, will take some time to develop, possibly even red-shirt one or both.
As for the perimeter, we'll need help at point. I assume Squire steps into the starting role, but there is some minutes available for someone like Manjon to step in. His game looks a lot like Shorts, and he plays for a very high level AAU club out of Oakland, but being asked to play point a substantial number of minutes at D1 as a freshman is tough, so we'll see his what his immediate impact is. Pepper is listed as a PG on verbal commits, but he strikes me as more of a Schneider type player, can handle the ball but is mostly an off guard. Pepper looks like he is ready to step in right away, but with Mooney and Gonzo and Fuller already taking up minutes, he'll have to force his way into the lineup. That leaves Harris, and red shirts Shaw and Ba, as intriguing wings. From his videos, Harris is super athletic but I'm not sure of his range. Assuming that part of his game comes around, he could see a lot of time. Shaw has good length and the lineage, and both he and Ba have a years worth of time with the team learning the system, so they could fight for time. Hard to predict how each will perform as we don't know how much their games have progressed over their red-shirt year.
I really like this years class. There is talent at every position, with a mix of juco's who can contribute right away, and freshman who may take time to adjust but look like they could be cornerstones of the program in the future.
I'd love to hear what others are thinking.