Improvement: Skill system - losing proficiency

[Immigrant]

I was wander about how will the skill training system work (by this I mean gaining more proficiency due to more use of certain weapon or vehicles etc). I think that some kind of loss due to inactivity would keep the player more equal and at edge with one another and also it would be realistic.

If we presume that proficiencies will be in percentages from 0-100 max then it should work this way. Also system = weapon, vehicle, aircraft, medkit etc.

1. Everyone should start at zero and it should increase with prolonged use of system in reverse exponential manner.

2. There should be a threshold at like 50 -60 % which once achieved you couldn't go under again due to not using that system.

3. From 50 % onwards there should be some kind of proficiency loss when certain system is not used at all or severely neglected. Maybe it could be linear loss or in same exponential manner it was attained.

4. You could be able to your proficiency values of system important to you as high as 80 maybe 90 % by using passive training feature that will be implemented. Of course you could maintain only several essential skill high enough this way what would allow casual players to maintain high level of proficiencies for desired systems and play styles.

5. Maintaining proficiency level above before mentioned level would require frequent use of that system to keep it as high as possible.

I think this system would make game more competitive and that players should always be practicing use to maintain top levels off proficiency so they couldn't relax after they max out a certain weapon proficiency (simple use it or lose it rule) yet it would be lenient enough to allow casual player not suffer due to it greatly.

What do you think?