If its worries about players not reaching uber greatness yet, then make the 18yo draft picks start out at a notch up so they can be trained to that level by 20-22 yo.
do me a favour at the rate your training you are barely covering the downward prices on the market... you may as well buy old dudes for one game then sell them and just repeat...
18yo at 300k with extra skills is going to be worth 300k in 12 months...with maybe 4-5 pops cos he will be a normal player then as he is now