You said it yourself
Brake hold works for several minutes, its like a manual handbrake lite for smooth getaways.
So what is the advantage that the system is set as a default. After when you start driving that should mean that every time you stop
the brake hold system is activated. So in a traffic jam (flat road). stop brake on forward brake off etc. I think that is too much
for the system.
I can,t oversee in wich situation you rolling back. My last holiday in Devon in June (more than enough up and down hill)
I never rolled back and I never used the brake hold system.
I suppose the 1.2T works the same as an Hybrid.
If you don,t noticed any difference between IMT on or off that means that you already drive smoothly.
So why you want it as a default you don,t need it.
I agree that sport mode should be possible to set it as a default