Sky 9,
We understand that you think that Ryanair should have acted differently. But all you have provided is rhetorical questions and statements like
What has happened to the passengers travelling from ACE back to the UK?
and
Whether Ryanair like it or not they do have obligations to their passengers
Yes, well, good rhetoric, but please tell us in simple clear terms what actions Ryanair should have done from the time the aircraft landed at the diversion airfield, and the order that they should have done them in.
For example; "they should have waited until the weather at the destination cleared, then reboarded the passengers, then flown to the destination, then operated the return sector with a delay."
That's only an example of what you might say. Please don't forget to cover all the angles such as FCL, ATC and stand clearances into the destination,overnight engineering cover if a nightstop were to become mandatory, rescheduling the following day's programme, calling in standby crews etc.
I'm sure you have a clear picture about how it should have been handled, instead of just criticism about how it was handled, so why not share it?