I believe it is used for seeing ratings how you want to see them.
Example: Maybe a QB's accuracy is more important in your offensive scheme than his arm strength is. You would weight pass accuracy higher than arm strength in the weights. Once you go through all the weights at that position, all those adjustments will show up in all QB's that you see in the league. Only you see the weighted ratings and everybody see's the default ratings.
If you pull up a players card you'll see 2 sets of ratings. The top one is based on your weights and the bottom one is the default ratings.
Another example:
MLB: maybe you want a fast defense that puts pressure on the QB. You might value speed, accel and pass rush over strength and run defense. It's up to you what you want to see out of your LB.
Maybe somebody can correct me if Im wrong here. Cause Im wrong a lot. But that's the way I have been using it.
As far as players getting better. That will depend on each player. Volatility give you an idea of how he will develop to a degree. The higher the vol the bigger chance he will boom or bust as we say. The low the number the better chance he has to develop close to his bars. Another kicker to that is playing time and age and i believe injuries but not sure about that. A player will need playing time to develop and also gain that valuable knowledge of the plays in their playbook. And your playbook comes from your head coach.
https://paydirt.myfootballnow.com/forums/4Here's a link to our league Help page. I'm working on gathering all of setherick's guides along with other ones I find. So that they are all together and in one place. I still have several more to find but it's a good start for you. Good reading and important info in them.
Welcome to MFN. If you like football strategy, it's a blast. Enjoy.