I disagree. I think the absolute best you could reasonably (and optimistically) project Newcomb for over his 5 years of control is about 10 wins, he's projected for 1.7 next year. Sure, there is some upside there, but I wouldn't feel comfortable giving him an SV over 50 or 60 million. Gallo can very reasonably be projected to produce 12 wins over his 4 years of control, at approximately the same cost. Gallo has more value pretty clearly in my opinion, so I think we'd need to add a high 45 FV or low 50 FV kind of prospect for fair value.
Joc Pederson is projected to be worth about 6.5 wins over the next two years around a probable cost of ~20 million dollars. So we'd have to pay ~40-45 million in surplus value in a trade for him. In the most recently updated valuation charts, Wilson and Wentz collectively have a value of around ~36 million dollars. So I added Cruz as a nice upside piece to make up for the missing 4-9 million in the valuation. That should be a perfectly fair swap.
The Peralta trade was the one that I thought I actually may have overpaid on, as he's only projected for around 5 wins at a similar cost to Pederson over his 2 years. On the valuation chart, Allard and Wilson would be worth ~38 million, but since I'm a good bit lower on Allard I think that valuation is a little rich and would be willing to send those two for Peralta.
I think those valuations are perfectly reasonable.