I don't think it's too much. I don't really consider deadlifts that much of a leg and instead a back exercise. I also go 1 rep max on deadlifts, where my 2nd to last set is nearly max and last rep is max.
I'd recommend doing romanian deadlifts instead of leg curls or leg press. I added them in the past year and really feel them. I do them elevated so i can really get low with barbell.