That's roughly a 50 (Salty), a 50/55 (Andrus, depending on when you want to take the snapshot), a 50 (Harrison), and another 45/50 (Feliz, depending on when you take the snapshot).
Considering the fact all prospect publications have docked pitching prospects by close to a full grade in the last 5ish years due to a better understanding of pitcher volatility, the modern day FVs for those prospects would likely be:
Salty: 50
Andrus: 50/55
Harrison: 40/45
Feliz: 40/45
Coincidentally, that's almost exactly the price we heard 2 years of Olson will cost. So no, I don't think it was some dramatic overpay in terms of prospect capital compared to modern day prospect valuations.
I can't disagree that they needed pitching, and I am 100% on board with getting Kotchman as the centerpiece a year later was horrible.
The issue i have with your method is it's agnostic of other factors.
In 2008 Andrus was 19 and Feliz was 19. They were young.
The issue I have with the trade was the same back then, we weren't that good of a team. I know we were "only" 5 games back or something. But the team was a mess. Andruw was falling apart, aside from Chipped the team was a bunch of average to above average hitters who didn't play much defense. At least in the infield. Chipper was never a stellar defender by this point in his career it was certainly true. Renteria was an offensive first Shortstop, Kelly Johnson wasn't great defensively, that's not great. Coupled with out pitching staff which was Smoltz, Hudson and a slew of bums.
Just to reiterate guys who started for us that year. Chuck James, Buddy Carlyle, Kyle Davies, Jo Jo Reyes, Lance Cormier, Mark Redmon, Jeff Bennett, Anthony Lerew, The only ones of those who gave us a positive value were James and Bennett. That says something bad.
And when we made that trade I wasn't really pissed at the rumored trade which was Harrison, Salty and Andrus, it was the inclusion of Feliz that was a dagger.
Can you imagine if instead of that trade we held those pieces and rolled into 2008 looking to make other deals. Salty had to go, because of McCann, but imagine a different world where instead of blowing the budget on Tex we tinker with a C/1B platoon while looking to trade Salty, or just straight up trade him for someone who can play 1B but isn't an elite talent.
Imagine a 2009 Atlanta Braves team with Andrus instead of Escobar, a solid kid like Harrison so we don't have to sign either Lowe or Kawakami, and Feliz added to that deadly bullpen with Soriano, Gonzalez, Moylan, Medlen, and O'Flaherty.
Or again just used those pieces more wisely in a trade. The issue was 2 fold for me. First there was no way Teixeira was sticking around like fools like Shanks were saying. Second this was a hubris trade by Scheurholz who wanted to reclaim glory, but seemingly forgot that this team wasn't that good the year before, with a team that was producing better. 2 of our 3 best players from the year before (McCann and Andruw) were having bad years. What we gained from better years at 2B, SS, RF and LF was minimal to the big losses in CF, C, and 1B Of course Tex would solve one of those issues, but that was it. 06 rotation was a mess and largely rolled into 07 with the same rotation. Didn't make any moves just kept rolling with James, Davies, etc.
THe Braves management of that era was so full of themselves, they shot the Franchise in the foot. The saving grace was that Heyward, Freeman, and Hanson were coming along