Skill Level

No. Play on All-pro, it isnt as hard as All Madden but not as easy as pro

when a skill is higher and you level it up, it contributes more to your overall level. With that being said, if you are a high level and level up a high skill it will contribute more to your overall level than if you are a high level and level up a low skill.
So to answer your question it all really depends on your level and the level of your skills.

there is no level cap.. only as many times as you can upgrade your skills.

And the higher the level of your skill, the closer it brings you to your next character level each time.

A level 40 skill going to 41 will bring more xp than a lvl 20 skill going to 21 for instance.

It takes about 25 skill increases per level-up. So, quit using any skills that are already at 100% and start developing new skills. Also, sometime during EACH level, purchase 5 Trainings in whatever skills are weakest. Those 5 purchased skill increases are
20% of those needed for the next level-up.

i understand math just fine, now show me where u got that equation, cause its rediculous to divide scores of any kind, how can dividing by obj and bonus score be relevent to squad attitude? my obj score is higher than my squad score, however i dont really
care about stats, if i thought it was fun to drive a jeep around in reverse for road kills id do it, so... whatever