There should be some sort of consistency stat that would help differentiate between the offensive baseliners and defensive baseliners. This would have helped with low UEs numbers for TS4 and could be a good addition for TS5. Basically guys w/ high power stats like offensive baseliners would have lower consistency, which would lead to more UEs. Defensive baseliners would have high consistency numbers.
This would solve what we are seeing now with guys putting everything into OB without having much of a penalty, and truly emulate what you see in real life where high power guys are usually less consistent off the ground and have more UEs.