As the above. Although my CT is untested in the Alps till 2016. Pyrenees though 2-up with luggage and the DCT system was excellent even on my least favourite aspect of going over passes, the uphill hairpin right-hander where you are going back on yourself up a steep slope.
Previously I found myself covering and occassionaly dipping and slipping the clutch. My poor skills admitedly and got better over time. No drama at all now on the CT.
Manual mode and 1st gear. (Auto-blip!) Takes care of business and I can give full concentration to my line round the corners.
Only thing I have had to improve is my lack of finesse on the throttle (a pigs trotter for a throttle hand.) Thats the only adjustment for the slow speed stuff.
But to your actual question
... engine braking will give you no concern in manual mode. (I rarely use the auto as I like playing the tunes on the glorious V4
Don't be too hard on MK as it will give you one of my favoruite uses of the fancy gearbox. Blatting away from the lights, short shifting, with a constant big lick on the throttle and pulling that trigger repeatedly fast in a Playstation style. Superb!
Another test ride required?