If the success rate on bringing up young arms "early" is 50%, then AA was a genius that was onto something. We can only hope that one out of every two arms coming up in the Jays' system has a career like Osuna's with the other flaming out.
That's one thing I liked about AA and this team in general. They don't game the system and delay prospects. When they are ready, they are ready. We can expect Vlad and Bo up when the team deems they are ready but the good thing is the team also has enough quality MIF depth where there will be no need to rush them either.
As far as Jansen is concerned, if he earns a spot, he needs to be here.