Fevola would be on par with Franklin if he hadn't missed last year. Would be above him had he not moved clubs. For the time period you chose they have the same goals per game average of 3.6
The game is also different now, which makes Franklin's effort more impressive in some aspects, but makes th 30% difference less impressive.
And Mark Jackson (3.8) has a higher goals per game average than LLoyd (3.4)and would be ahead of him if not for similar petulance and disclinplanary reasons as Fevola. The point being, Fevola had serious flaws, was let go twice and is not up there with Franklin as a result (just like Jacko comes nowhere near Lloydy). You cannot play 'what if', otherwise I could argue Laurence Angwin would have been better than James Hird if he wasn't an idiot. Fevola's mental flaws are no less significant than any physical or skill based flaw that any player has. 'What if Schoenmakers was as strong as Jakovich? - he'd be the best defender in the league. The facts remains that Franklin is 30% ahead over the last 5 years, regardless of what Fevola might have done had he been without his weaknesses.
The second part of your post is a little ambiguous so without further clarity I will not comment.