I was a Training First Officer in my first airline, I did Type Rating groundschool, pilot induction, recurrent and differences courses. It was, in my opinion, great for development etc...
My next airline wouldn't even consider such a thing, training could only be done by captains, senior captains, captains that had been in the organisation a long time, captains that were indeed winged skygods....
I'm glad I'm where I am now.