Reds have 3 ranked in Top 100

[texasdave]

The scouting scale goes from 20 to 80, and Gose, the Toronto Blue Jays center fielder on the short list of the game's speediest behind Hamilton, grades out as an 80.

"If I'm an 80," Gose said, "that means he's a 100."

[OGB]

Thats true, though i do believe time will indicate that they traded the wrong catching prospect. And i wont go so far as to say Cozart is an "established major league short stop." He is worse than a no hit middle infielder, he is a no get on base middle infielder. He is slick with the glove but so is Gregorious, and Didi is alot better with the bat.
And Alonso is capable of playing the outfield, which will have a hole when ludwick is gone. I'm not saying don't trade prospects, but there is a reason why teams are doing it less and less.

The season after Ludwick's gone, Alonso will be 28

[M2]

And Alonso is capable of playing the outfield

No he's not. He's barely capable of playing 1B. Defensively speaking his optimal position is DH.