- it is indeed 'non-standard' in as much as you have absolutely NO idea what min manoeuvre speed is, do you?
Manoeuvre speed for flap 2 is depicted on the speedtape, Flap 2 is an excellent flap setting for the NG and I use it almost every day. Great for speed control as well as long ILS approaches. Clean speed and flap 2 often works very well when setting up for low drag approaches.
When it comes to flap 25, it is recommended to avoid large trim changes during flap config. I believe this is the reason that all operators I've flown with use it in between 15 and 30.