With Len retiring, I do think we might have a shot of getting rid of Shirley. Definitely think she'll audition and will leave us if she gets the gig. Wouldn't shock me if they went in-house though and promoted long term pro Cheryl Burke who is planning to stop dancing after 25 seasons in the same way that Strictly promoted Anton.
Regarding that interview with Sarah James and tension with pros, I can well believe that, it was around the time that James was axed, Ola was no longer happy, the Cliftons were taking over (with Kevin as teacher's pet, that had to rub some long termers up the wrong way), Aliona had Gregg that year and then decided that 2015 would be her last year, Kristina wanted to leave after 2014 as well etc, Robin was injured, Tristan may have felt disillusioned going from DWTS to SCD, Brendan was totally phoning it in after Sophie etc. I don't think some of the pros were happy with Louise Rainbow if I'm being honest.
The whole happy family thing is both toxic and creepy in equal measure, like a cult. If my workplace wanted to promote that, I'd run a mile at the earliest opportunity.