I have done exactly this a few weeks ago. I felt the RP23 on my Blur LTc would get overwhelmed and performance started to drop when pushed hard.
I was thinking about a CCDB Air but was put off by the cost. One popped up on here second hand in the right size so I snapped it up.
It’s taken a bit of fettling to get it set up and I wasn’t convinced at all to start with. I’ve ended up a bit away froM the base tune. Only this week on trip up to Yorkshire has it started to convince me it’s an improvement. I’ll reserve full judgement until I’ve given it something to really think about.
I approve of the tuneability. I don’t miss the pro pedal, obviously the CS model is available if you want. The additional weight was unwelcome. I would struggle to recommend it as a +£400 upgrade unless you need a new shock and what something a bit more capable.