I think low-trail has potential to help but I am of the mind that your issue is more a skill and familiarity issue than anything else. I am regularly alternate a high and low trail bike right now as a I figure out some fit quirks. Descending on pavement is different for each but I can't really conceptualize one being more or less comfortable steering from the drops than the other.

Thinking about your question; if you're having a hard time descending due to being uncomfortable leaning or counter-steering then low-trail will definitely help as it requires much less of both to negotiate descending corners. When I first get on my low trail bike it feels almost like it has a steering wheel that I turn left or right to go around corners, and that's it. Switching to my high-trail bike is like being on a motorcycle; there's some steering interaction but it's much more counter-steer and leaning. High-trail is riding up on the side-tread and putting more side force into the tires than low-trail so I feel less confident descending on loose surfaces or wet surfaces until I acclimate. So I think it is possible it may help you but I would recommend working skills more than relying on geometry.

What are you riding now? What model Rawland are you looking at? The walmart one?