User blog comment:LivesByProxy/Balance? Thoughts on Accuracy, Mobility, Range, & Tanks/@comment-5035765-20151127114344/@comment-24087642-20151130043429

Cait's range isn't long for a simple reason:

LoL's design team consider heroes like dota's 1200 attackrange Sniper "anti-fun". So they don't have any champs with particularly long range.