See my post #8 in that thread. 2 1/2 years later we still have no complaints. Really, it is the FA that faces our organization; lots of quality back offices for FAs out there, including Fido, Schwab, and TDAmeritrade. I recall reading this type of work is a fairly big deal at TDAmeritrade and one of the reasons Schwab bought them.
I didn't know that LPL even dealt directly with retail investors. (see https://www.lpl.com/
) Are you sure she's not working with an AUM advisor that uses LPL? That's what would worry me.