I would consider two things: what it is that your daughter would like to get out of both her time in colleges, as well as her goals after college?
The CSU system was established to provide a more practical, more hands-on education and advanced job skills (teachers, CPA’s, artists, business), as opposed to the UC’s which were established to graduate those who would likely need graduate school (JD’s, MD’s and PhD’s).
It’s in error - although fairly common around my neck of the woods - to assume that “the smart kids go to UC’s, the average kids go to CSU’s and the uncertain’s go to community colleges.”
If your daughter has educational goals that include a higher degree, then a visit to UC Merced may be in order.
The primary reason that it ranks low on the desirability scale is it’s location. See for yourselves if that’s a factor.
It’s a great school and a chance for her to be a big fish in a small pond, which she would not get at other UC’s.
Other people’s perceptions don’t count. Her’s does.
If your daughter wants to study CS to secure a good and interesting job after graduation, then by all means CPP or LB would be more than appropriate, with CPP as a whole more oriented toward STEM subjects.
For all of the schools she’s considering, she should go to the departmental pages for CS and see what her requirements will be and what the goals/mission of the particular schools’ departments are.
Even though they are all CS, similar majors at different schools can differ in their approach to the subject matter.
For example some might be more business-oriented, while others geared more toward new technologies.
As far as social and the more traditional college experience, Merced and CPP both offer that.
LB to a slightly lesser extent, primarily because almost all student move off campus after their first year and the area can be expensive, meaning many student commute from lower-cost areas.
However, Merced’s location in the central valley can be a turn off to those coming from more urban areas. LB has the advantage of it’s beach community, while CPP has a more residential college feel and is close to the mountains.
Will you have a chance to visit? Your daughter should try to get a feel for what’s available to her on all campuses and determine which makes the most sense for her.
Hope this helps.
Best of luck with the decision.