Training is a good thing to do once you have some money to spare and want a quick boost to start with, but the chance for increase is pretty much 0 at level 50. Once I add more settlements and better paying jobs, level 50 will be pretty much nothing. Right now it is pretty much all you need to learn most recipes. Main way of increasing stats after training is working. It is slower, but you get money and some physical stats.
Suggestion thread is in the general section. Here.
As for the plan for the game, some things are planned to the last detail and some things are just rough ideas I have. If you think something would fit into this game, feel free to post it in the suggestion section, even though there is a big chance it is already planned.