There are two LA options - regular LA and Divers Den (don't conflate the two when evaluating LiveAquaria product). I only purchase from Divers Den (stringent protocols to insure healthy fish - see link below) and have always received excellent livestock in very good condition. When purchasing from DD, I still treat with Safety Stop after acclamation. I also purchase from TSM which are an excellent source for quarantined livestock. I don't feel the need for a Safety Stop treatment for product from TSM as they have the very utmost quarantine/treatment prior to release for sale.
IMO the OP should increase the drip acclamation to 30-45 minutes minimum. Also, fish purchased from the LFS almost always require QT since they generally do not perform any sort of QT prior to shipment (except perhaps therapeutic copper in the water and low salinity). Since you are unable/unwilling to QT, at a minimum treat with Safety Stop after acclamation.
Good luck and hope all turns out well.
LiveAquaria® Diver's Den® WYSIWYG Store Quarantine Procedure for Marine Fish
www.liveaquaria.com