The chances that they move the DESRON to SD are slim--->none. There are logistical and operational advantages of having the DESRON and CSG staffs colocated.
You're not wrong, but while it's great for the staff it's trash for the ships (see below).
What exactly did you find lacking? Honestly just curious.
Keep in mind that this is just one opinion, but...
The largest issue was the lack of support for the combat systems side of the house. Essentially every tech had to be flown in, and few of them wanted to stay for extended periods of time. Coming out of a yard period with a baseline upgrade made for some interesting times for the FCA types when there was essentially no one that the (very junior) CSMM could ask for help - made worse by a very junior STO (with no AEGIS experience). Credit to those guys for busting their ass to get the systems operational and run down the various ghosts and bugs that plagued them. There were a lot of really late nights and weekends for them.
Beyond that, the entire material condition of the ships suffers as a result of both poor conditions (150+ days of rain a year) and limited support from IMF (not enough personnel, pretty firm on everything requiring screening 1-3+ months out so they can fight for their manning, vice the massive SWRMC pool). Lots of things that just can't be done up there (i.e. certifying your welders, keeping them current), and various QA requirements for ships.
Training and crew also suffers because ATGPNW doesn't know much about AEGIS, and many basic phase events are conducted in San Diego (enjoy your Friday underway for start of activities on Monday, transit back Friday to Monday into a normal work week - if you come back at all). There were ships that were literally away from home port for 8 weeks during basic phase in and out of San Diego trying to get their systems working and complete events.
After those cert issues, there's just general quality of life in terms of personal support. The base gym is great, and the mini-NEX is decent for a small base, but the NEX/COM are both like 15 miles north of the base (into heavy traffic), and there's nowhere close to enough medical providers available to support ships and basic, routine, medical procedures.
Just overall the base, while physically nice (the view is amazing), isn't set up for DDGs. And lets not talk about the outbound transit with the new NAVDORM requirements...
They're trying to make it better - and it has gotten marginally better over time - but that base was essentially stood down when they finished with tie frigates, and it's still trying to figure out again how to be a naval base and support operational ships.