Mostly because I had more than a few apps (or conversations about apps) that involved Dexterity 8 + multiple other combat stats at 5+ with little to no points put into other skills. There's been an odd drive of "I must be the biggest combat monster evar!" that I was not expecting.
Also, in the Buffy RPG the combat system is driven so much towards the Dex attribute that it is probably broken. As such I've had several apps (or app convos) that involved putting few points in other attributes but pumping Dexterity up to 8 or 9.
The limits I've put on the combat stats are still very liberal and allow for characters with a focus on combat it just requires them to also think about other aspects of their characters existence (I hope).
Hope that helps explain things!