Honestly I couldn't tell you man. I guess I'd have to say it's whatever you'd want to make of it. You hear about 250s- they have condensed training but it wouldn't be nearly as bad as the two year AFROTC stint. However...If you're worried about the AS classes, don't be. They can be taken back to back & overlapping with ease- which is what they would offer.
I am not sure how FT will work. I don't know of anyone who is doing this 2 year program, as it has just been ok'd this fall (it's not really publicly advertised for whatever reason)- I only know cadre at dets here & there who have talked about it (for better or worse...) But if you're worried about field training, don't be...
I am getting the gist you're more worried about the time commitment of cramming everything in- understandable. AFOQT is another bridge to cross. I won't say you don't need to study crazily (I failed 1st time so I studied crazily the 2nd go around) but I have two full AFOQT PDF practice exams with answers you can utilize. Just PM me. And recall- there's only a handful of sections you truly need to pass with flying colors (verbal, math, & quantitative? Someone verify that?) so you don't necessarily need to study the entirety of the test (science, block counting, etc) unless you want to pursue a rated AFSC (then you will want to focus on aviation, block counting or whatever else)...
Also UCSB has the party school stigma attached to it for a reason! 2 of my best friends attended UCSB, friend's sibling is there right now. I loved visiting on weekends from NorCal. You'll want to experience DP, etc. but just remember your goals (officership/commissioning) if you decide to go through with it so you don't do anything that would derail your commissioning...
Edit: ofc your other option is OTS if officership is what you seek, but I haven't a clue what manning #s currently are or are projected to be- but I would ask yourself what your goals are post-grad.. if rated is what you seek I believe I have read around OTS rated slots have/will continue to increase? Not sure. You'll have to do some leg work!