Regarding Drew's line drive percentage of 23.8, about half has come at Chase Field, with its tied for 7th highest press box height of 62'.

An extra foot can add .002 to line drive percent, so without Chase's extra 24 feet over O.Co (tied for lowest at 38') Drew's LD% might be closer to 19.0%, which would tie him with Carlos Santana, Mike Carp, Jimmy Rollins, Michael Cuddyer, Adam Jones, Chris Young, Mike Trout, and Alexi Amarista at #156.

http://www.hardballtimes.com/main/article/when-is-a-fly-ball-a-line-drive/

Then again, Fangraphs has him essentially equal on LD% home and away (and higher at 29% than BP and Baseball Reference's 23.8%).

According to Baseball Reference, on Drew’s 24 line drives he has a triple slash line of .667/.667/1.042, whereas on grounders and flies it’s .152/.152/.152 and .116/.114/.279. His BABIP is lower on the road, but that’s also where he has his only two home runs (and a substandard 7.0% HR/FB rate).