Everything is based on Steamer projections exactly so we avoid this type of "but I think so and so is better" type of fallacy. We have tested formulas that rely on industry-standard projections (based on actual performance) and numbers come out and we use the output. It works so well that only very rarely do we go in and adjust something.
As for STAM, you have to remember that
stamina does not progress in the game. So we've tried to hit the sweet spot of what guys might turn into without overdoing it. Otherwise you have a bunch of 5 inning starting pitchers with 68 STAM in year 7 of your franchise. No thanks.
Also saying that Syndergaard at 97 and Arrieta only at 96 OVR is a big deal is a bit of a stretch, lol. You made it sound like Arrieta was a 65 OVR or something. It's not like Syndergaard isn't one of the most dominant pitchers around either. OVR isn't everything. Try playing with them and then make your judgments.
The refrain: if you don't like something, then change it. The roster plays well and sims well and we're comfortable with the system we have in place. This roster isn't for everyone; many people are quite happy with how Sony does things.
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EDIT: Just for the fun of it, here are some stats for these guys from real life this year...
Hamels (87 OVR): 5-0, 2.83 ERA, 1.26 WHIP, 4.48 FIP, 9.73 K/9, 3.30 BB/9, 1.57 HR/9, 0.4 fWAR
Velasquez (89 OVR): 5-1, 2.42 ERA, 0.99 WHIP, 2.43 FIP, 10.99 K/9, 2.79 BB/9, 0.56 HR/9, 1.7 fWAR
Arrieta (96 OVR): 8-0, 1.29 ERA, 0.84 WHIP, 2.48 FIP, 9.00 K/9, 2.86 BB/9, 0.29 HR/9, 1.9 fWAR
Syndergaard (97 OVR): 5-2, 1.94 ERA, 0.98 WHIP, 1.70 FIP, 11.34 K/9, 1.34 BB/9, 0.45 HR/9, 2.5 fWAR
How are the projections doing so far?