As it could very well lead to an unstable approach, the possibility of a go around is extremely high.
It is very important not to make a conventional go around. Simply increasing trust slightly will raise the nose and start the manouver. Trust has then to be increased in small doses, whilst trimming forward in short bursts simultaneously.
If TOGA is applied conventionally, you are practically sure to lose it, as it will point to the sky like a rocket........ whith your speed going the other way.
I too found that CM2 handling roll, whilst CM1 handling trottles/trim, and therefore pitch (the tricky bit!), worked very well.
Lastly, we found that once on the localiser, keeping level flight with flap 3, if gear is selected down when just under half-scale below glideslope, the plane will simply pitch down to just about -3 degrees FPA, with very little trust/trim change needed therafter.