Ok, so I have no idea why Ultimate Scout is winning, because it's not even a very defined concept.
There are really only two ways you can even be a scout. One way is through use of U-Turn / Protect... and we seriously don't need to base an entire CAP over these two moves. The other way is through being a good mixed wall that can switch in to the majority of threats at least once without being completely destroyed. Cresselia comes to mind as an excellent scout as so few Pokemon can actually OHKO it, and it makes a great transition Pokemon when figuring out a set.
I'm just saying that it's really not that great of a concept and without some kind of new scouting tool, it's really not going to even be doing anything. Not to mention... do we really want another defensive Pokemon for CAP? Not me...