From what I remember, Tom cut ties with Lisa because during John's malpractice trial, her lawyer called Margo to the stand and dragged her through the mud, or called Tom and made him drag her through the mud, or something.
I'm not sure what was going on with Dani either. She was presented as a hellion for a while into Ashley Williams' run - there's an episode from spring 96 where Hal doesn't want her at Nikki's birthday party, and Nikki blows up (again) and says no party if Dani isn't there.
Fall 95 was still a decent period for the show, with Culliton, and with Valente not allowed to do too much damage. Sadly it fell apart by January.
I'm reminded again of how much Lily annoyed me...