Need advice for developing Players

It does seem very random to me. I know it's not that simple, but also, it seems a lot harder than it should be to focus on developing specific players (in specific ways also, would be nice, depending on where they fall short).

They should benefit from getting chances to make the team and stuff.

But I often feel like when I try to develop players, it doesn't make much difference what I do. After a couple of seasons, some players are ready and some are not.

What I've done when I go for a rebuild is simply add some interesting prospects, and then simulate and some of them grow into something, and some don't. Also try to use the best possible coach, but I haven't really paid attention to wether or not this has really benefited particular players.

I guess that is "realistic" in a way, but also, it would be nice if it was easier to make an effort with players you want to develop faster and in a specific skill.

So much to experiment with...