The "bonus" is just a disgrace. They are just bonding people with even worse terms and conditions.
They need to do something now and immediately. Raise the day off payment up to 1000€ for cpt's and 500€ for FO's at least. Then on top of that the bonus without any conditions and new improved contracts. The new "extra" pay they are providing is just a one big joke, nothing more.
Well, nothing will change anyway, they will never change.
Just leave.