Hand Solo,
You are very right when saying that a single inexperienced (but qualified) crew member on a cockpit crew is perfectly ok these days, however the problem here is that Crossair teamed up 2 inexperienced pilots!
I can assure you I have never heard of anything like that at any other company!
As a F/O I have flown with captains fresh on the plane too, but I can assure you they would not have been teamed up with an equally junior co-pilot (less then 500hrs on type)!
Besides, if the F/O was indeed very new to the company (less then 100hrs) how come he is alredy fully released? Surely they must have something like line training after you have finished your simulator check?