Seem's to have fixed itself :S
I had a badly hunting idle but just wound the AAC valve out a bit and it was all good. I reloaded my last save of my tune onto it just to be safe but noticed nothing wrong with the monitering on FC-Edit
VCT stays off now unless a slight amount of throttle is applied (TPS V is about 0.48 when it switches on, so doesnt seem like the TPS was out of adjustment) So its back to normal
Seem to have decent F/C on decel again now.
Bit of a weird one, thought it was going to be a problem so happy it fixed itself