The plan is to ALWAYS use both L1 and L2 for boarding and disembarkation.
Also the schedule has 30 minute transits for the 320s. Not sure if that will always be the plan or just while the company gets used to them.
You'd be surprised how quickly boarding happens with free seating. I can't figure out why as haven't seen pax running to the aircraft... It gets a bit messy in the gate lounge though with pax 'rushing' us to tear boarding passes faster. But I don't think boarding has taken longer than 8 minutes on my flights so far.
No doubt using two doors will make it quicker - especially for disembarkation.
And for those of you who are still concerned I have not seen a tech crew help on 25 minute transits. Some even apologising that 'they were busy'. And I assume that it wasn't doing their makeup!
Our 'tidying' tasks only take two minutes so it is usually over by the time the guys get out of the flight deck anyway.