There’s nothing a private counselor can do to “get you into a really good college.” If they say they can, you should hire someone else. I say that because all colleges, read again ALL COLLEGES look at your GPA first. Nearly all colleges look at your test scores next. If your counselor can change those numbers, then they can get you in. As you know, they can’t.
What a good counselor should do is to help you find good fits for your personal profile, both academically and non-academically and maybe, maybe help you edit and tailor your essay(s) (not required at Poly).
I can’t speak for the rest of your schools, but Cal Poly admits by a strict algorithm. Even if you get all As this year, Architecture will be an extremely long shot. If you do get in, you certainly won’t get a “full ride.” In fact it’s unlikely that you’ll get any merit money at all. The reward at programs that are hyper competitive is simply admission.
I’m not trying to rain on your parade, but I really think you need to back up a step and search for programs you have a better shot at getting into. The die is mostly cast with very little time left to influence it. I’m afraid you will likely bar let down by every school on your current list.
Note: The statistics that @Gumbymom posted are impressive, but they are misleading. The College of Architecture and Environmental Design has 5 majors. Three of them are among the easiest admits at Cal Poly. Those majors (city planning, construction management and landscape architecture) pull down the stats for the college. You can be assured that Architecture and AE averages are much more in line with CENG, with the average GPA over 4.0 and the average SAT over 1400.