I remember flying a freelance trip with Citation II with roughly 150hrs under the belt as total Jet time. My Copilot was on his FIRST trip after the SIM. We went EDDS-EGLL-LFPG-EDDS.
This trip was a nightmare. The guy was just good to handle the coffee bin. So it was me going basicallly SH into Heathrow, for the first time btw.
But within a few hours he turned in a capable, good F/O.
That is the routine we all went through and I donīt think that this is different in Blink or any other new startup company. I never flew the 510 but I do have some 2000rs C525/525A and I donīt think the Mustang is very different in its flying characteristics. The 525 is easy to fly. The Garmin 1000 is easy to handle.
If they really stick with experienced Captains (get them is the prob!) then I wouldnīt worry about that. The CRM "problem" is a laugh. Many airlines had 250hrs cos and there was/is no prob.
Real question is: can they be cheaper or so much better that they can attract the amount of customers they need.
If so, they have every right and cause to be in the market, if not...