The serious lack of PIC time concerns me about the MPL.
Only when your ass is on the line will you gain experience you need to be a safe pilot.
Trust me. I checked out plenty of near-career FOs when they came to RAH as J4J Captains.
The guys were all smart, they could all fly well, but it was blatantly obvious they weren't thinking far enough ahead to be a high-level performer as a Captain. They also were a bit timid about making decisions.
I witnessed this in the OE and annual linecheck department.
The last thing someone needs in a hot situation is an individual that hasn't had to make decisions in the cockpit for 15 years. Or worse, you have the CA pass out and now the FO, who's never had to make a decision by themselves in an airplane have a full boat of passengers and crew, helpless and oblivious in the back, over the rockies at night and this guy has to do all the diversion planning.
Your support for the MPL leads me to believe that you've never been involved in the training of Captains at the regional level, nor in any safety programs like ASAP. Either of which would expose you to problems, that in my estimation, would grow in a large and rapid succession if an MPL program is initiated.
And don't try to twist it that I'm scared of low time guys in airplanes or regionals or anything else. I'm all for ab initio. I'm all for a professional pilot track of training that is tightly done. I'm all for the US to institude a "frozen" ATP to prove that anyone flying in a 135 or 121 environment have demonstrated the aptitude (there's seaav8or's word) for the job.
You wanna bet your life it won't happen to you? If the MPL comes to fruition, you'd better be able to do that.
Thats one of my initial issues with the MPL concept. I'm not "doom and gloom" about it, but there are portions of it that concern me. This part, with the FO-mode and never having to be the guy in the left seat with the weight of the decision making; makes me fear that it'd be creating (to use a military term) career wingmen....who may or may not be able to step up and be ready to take the helm when the time came. Or, who would always be looking to their left for the security of the guy sitting.....not thoroughly prepped for the time when they look to the left and see their own reflection, as Velo has eloquently stated before.
Now, the argument to this can be that they're always getting trained and are always soaking up knowledge from their time in the right seat. While there's merit to that concept, I still believe that time is needed in the "hot seat" to really get the exposure, experience, and hence the confidence to really be ready to become a Capt of a pax airliner. To me, thats where places like CFIing, single pilot 135 cargo, or any other of the myriad of broad experience-gaining flying jobs...where it's really just YOU there making the decisions and getting the experience, really pay off. Just seems that the exposure the MPL will get will be such a limited part of aviation as a whole.
I'm not saying the MPL is unsafe, but I'm not yet fully convinced of the viability of it. I'd have to see more of it.