Playing devil’s advocate here: I think the issue with accepting you as a senior transfer would basically negate a UCI education in that you “completed” the majority of your education at another non-UC facility.
I don’t know how an upper level major is possible at a CCC unless the CCC has permission from the State of California to grant Bachelor’s degrees. Coursework at the CC’s provide PREPARATION coursework for the major course of study.
If you are granted a diploma from a UC or any other university, they have to guarantee to future employers/schools that you have met the minimum requirements for graduation in preparation for a career. UC’s have to present you as being prepared to enter the workforce or graduate school with UC level expectations.