5% is .050, you know- not .005. If someone's LD% goes up .050, it might have something(or a lot) to do with why the BAbip went up .060.
I'm not saying LD% accounts for all of the differentials, but I don't think just looking at wild discrepancies in BAbip without also looking at LD% and Hard hit% helps factor in how much be just good or bad luck.
Certainly every line drive does not fall for a hit- just as every soft hit ball is not an out, but if someone's LD% goes up, I'd expect his BAbip to go up, also.
BTW, if someone's LD% goes from 25% to 30%, it not increasing by 5%, it's actually going up 20%.
5/25= 20%