lol
first i had 2 give u a ball 4 that essay
i dont have data from crowdsourcing but did have stuff from moutlinho, polish nt & coach parrot all suggested it is like 2% per level
it isn't just an academic debate the numbers make a massive difference
if u r right & lev 7 = 100% & lev 4 = 80% then lev 4 is rooted
but if the others r right & lev 7 = 100%, lev 6 98%, lev 5 95-6% lev 4 95-92% then it is way different
& 2 make it worse the other factor is exactly as u say, cost
using a lev 4 trainer who cost $20k 2 buy & 15k a week replaced every season over 5 seasons =
(20,000x5)+(15,000x14x5) = $1,150,000
using a lev 7 trainer who costs $1,000,000 2 buy & 50k a week replaced every season over 5 seasons =
(1,000,000x5)+(50,000x14x5) = $8,500,000
$8.5 million!!!!
& he isnt even close to finished after 5 seasons
look at the current cost of players & tell me what player is worth that?