Cost benefit analysis
Back to the original concept:
With an airplane that is prone to iced up pitot tubes, which then causes loss of airspeed, which causes loss of autopilot and autothrust, and with no high altitude training in hand flying, and flying in an area of high buildups and potential turbulence, it seems to me the best course of action is to AVOID it all in the first place.
Simulator training costs money, deviations around weather costs money, hiring experienced pilots costs money --
If you can't afford it you shouldn't try to operate an airline.