Hi Drivethruhero, welcome to T-Nation.
Personally, I'd tell you to stop doing conventional deads for a while until the rest of your leg musculature has caught up. Romanian deadlifts are fine as they tend to be more hamstring dominant, but I'd suggest keeping the weight relatively light and really focusing on form. And by form I don't just mean that you look like pictures/videos of people doing the move, I also mean that you learn to do the move with your hamstrings. This means concentrating on contracting your hamstrings against the resistance rather than just going through the motions.
As far as squats go, first I'll ask how you're performing your squats? Are you doing a powerlifting style squat (knees not allowed to go over toes, emphasis on sitting back, stopping at parallel)? Or are you doing an olympic/or "Ass to Grass" (ATG) squat (knees allowed to track normally, sitting down between the legs, sitting down until the hamstrings touch the calves)?
If it's the former, then realize that this is a "posterior chain" (glutes/hamstrings) dominant squat by nature. If you're trying to minimize glute involvement, then do not do this type of squat. If it's the later then try learning front squats. Or heck, why not learn front squats either way.
Front squats force you to keep a more upright torso position (which minimizes posterior chain involvement) and are (if done correctly) a quad dominant movement. In fact, squatting with your heels on a plate pretty much does the same thing as performing front squats.
In other words it forces your torso to stay more upright. If you were to lean forward, like a lot of people do when performing back squats (which brings the glues and hammies much more into play), you would fall forward. Really doing squats with your heels on the plate is just a way to help people with poor ankle flexibility keep their torsos more upright while at the same time allowing them to be able to get a full range of motion.
This is good. But, learning how to correctly front squat would be even better IMO. Not only will it give you all of the benefits of squatting with your heels on a plate, but it'll also help you to gain better ankle mobility (which could prevent injury in the future).
Hope this helps.