I stopped using weedguards also, Like JayB, I believe I missed strikes because of the guard bouncing off of the fish's mouth and preventing a hook up.
I had an epiphany moment when I realized that I should be tying crawfish, Muddlers, leeches, etc. like my saltwater flats flies with the hook barb UP! Also, putting some lead wire on the hook shank would make the CG lower, and the fly would turn barb up. Also, the lead wire helped the fly to sink to the bottom faster. My success rate greatly improved, and I caught a lot less turtle grass and vegetation.