So, I’ve booked my 34s in to get them Push tuned as they are due a service and they are really sticky in ‘Trail’ and a bit soft in ‘descend’. This seemed a cheaper option than shelling out for Pikes. Anyone had it done and regretted it?

I’ve had it done – no regrets, in fact the opposite, big improvement I found.
You lose the lock out for climbing, but I never used that, so don’t miss it.