Advice about doing untimed solves still holds.
I suck at using Roux (27 seconds average) compared to the other big methods (sub-20 with CFOP, Petrus, ZZ) so I can't really give advice about Roux specifically, but I have switched methods a couple of times. I think committing yourself to a single method is a mistake that a lot of beginners make; it makes sense if you're impatient and want to see immediate improvement in your times, but I feel like most people don't give other methods a chance at all. Do give Roux a try, but don't commit to never switching back to CFOP if Roux doesn't work out for you. (Same for ZZ and other methods!)