Ellsbury only has 1 HR and 3 SB's in 99 at bats this season... If you look at his HR/FB% this year it's back in line with his career norm with last year's being a million times higher... I wouldn't expect that to go much higher. He's also hitting less fly balls than in the past, more ground balls, and has a higher percentage of infield pop outs.
To put things into perspective, in the last 30 days here are Ellsbury and Trout's numbers:
Ellsbury - .301 BA, 11 runs, 1 HR, 3 RBI, 3 SB
Trout - .371 BA, 30 runs, 9 HR, 22 RBI, 9 SB
I know you're getting Greinke too, but the question I'd be asking is whether or not your offense can take the loss.
This is my concern. Is the addition of Greinke worth the loss in offense, and I'm not sure my offense can take the hit. Plus selling Trout almost feels like selling a piece of my soul.
Very tough call. More opinions to tip the scales?