You said you were "missing" using the irons. This may sound silly, but you did zero them, right?
Is the carry handle on tight and solid?
I have MagPul and Troy BUIS and they don't have any elevation adjustment. With a 50 yard zero, you're good to around 250 yards or do, so, do you really need more?
Keep in mind too, you likely won't be able to mount both the scope and the rear sight. At least I haven't been able too.
I've never really been a scope guy, and preferred the irons until I got my first red dot, which is my preferred choice for the AR's now. I did recently get one of the Vortex Strike Eagles, and it's really starting to grow on me. It's a 1 x 8 with a lit reticle, so it can be a red dot of sorts as well.
My eyes are starting to go more quickly now it seems, and that added power at longer ranges is a help. I normally just leave it set at 1x, and it's fast and easy to shoot with