...I don't think the pure-ranged-warden crowd is very big ... Momentum and Hurry Up With That are good traits. ...
I figured people would take exception to my list of potential traits to replace. Please bear in mind that is a broad list and they only need to replace a trait or two with a ranged gambit upgrade to make yellow a more appealing ranged class.
Even though there aren't many people who play it ranged, if a few of the debatably-useful traits were replaced with range bleeds/damage, perhaps a lot more people WOULD play it ranged. It seems like a really easy fix for yellow line. The other option for yellow would be making it a more effective debuff line, but that would require a lot more work from the ground up- and I'm not sure there's much demand for that anyway.