I remember Q105's decline as being very rapid, but you likely have access to information I didn’t at the time.
I do remember, though, that Lite Rock 96 hired most of the staff away from Q105 that WFLZ didn’t. I also remember hearing Mason Dixon on Y-95 in Dallas waiting for his non compete with Q105 to expire so he could join the rest of his former co-workers at 95.7, which became WMTX “Mix 95.7” shortly before he arrived. That was really the final nail in the coffin for the old Q105 as it closed the wide open lane Q105 had to take the Hot AC reins while leaving Power Pig with hard-to-sell younger demos.
Of course, the battle between Q105 and Power Pig was a lot closer than it sometimes looked. Q got a handful of books after getting beaten, which may have been the justification for trying to get that younger audience back.