From what I can recall of the meetings, it was mentioned that there will almost inevitably be software glitches associated with the introduction of mod 45 cockpit warning system. This is the nature of all software.
Bristow has anticipated this and is in no hurry to bring the EC225 back into service en masse. There is likely to be an initial period of relatively few flights, perhaps not carrying passengers, while experience is gained with new procedures and engineering practices.
All the colleagues I have spoken to are confident that the likelihood of an actual mechanical failure recurring in the bevel gear has now been reduced to virtually nil, due to rigorous anti-corrosion measures.
By "virtually nil" I mean no more prone now to failure with the existing shaft design than with the new shaft to be introduced in 2014. Personally I would feel more relaxed flying with a well-monitored old-style shaft.