Personally I am going to give the changes some time before I judge them, but at first glance I like it. The training change has the potential to be the most interesting but enjoyable in my opinion. Players that recieve training will continue to improve and get the odd pop in areas that are not expected, sounds reasonable and realistic.
I hope your interpretation is wrong cause otherwise it could irresponsibly kill some players just below potential who are avoiding "expensive" pops with no protection from it. Similar proble would be with top/expensive players where one unwanted pop could make them much less affordable. Imagine some nt center getting 2-3 random pops in shotblocking, That could seriously change his future. I thjink micromanagement of these things shouldn't be punished by random pops. Also value of off position training would be crippled.
It hink BB should clarify what they meant, cause otherwise next Season big part of BB managers would be shocked one way or another.