The rear feels the same/same noises as when you had the spacer lift?
OME is a stiff ride, but I can't imagine it feeling anything like a spacer lift.
Give it time to settle, drive over some rough terrain, flex it out, and let it do it's thing and see if the problem persists.
A photo might help as well in case something is visually wrong.

How long does it ride stiff/ take to break in? id like to have an idea im putting mine on next week

No way to say in so many miles or so long of a time.
Depends on how you use yours, where you take it etc.
If you install it, then take it off road the next weekend and wheel it like you should , then a few weeks
If you go to the mall and back and forth to work, then month or longer

what I've found with mine is that those springs are really cushy if you hit them with enough force. I guess it has to due with the stages? The experts can explain better, but I found that if I hit bumps FASTER, the OME's are amazingly smooth. I drive 43 miles into the wilderness on one of the most remote roads in the country, and now I have a rig that I can cut that trip into 1/2 the time it used to take, all thanks to OME suspension

What if you go over some curbs at the mall, Tom?

hmm, now you got me thinking

what I've found with mine is that those springs are really cushy if you hit them with enough force. I guess it has to due with the stages? The experts can explain better, but I found that if I hit bumps FASTER, the OME's are amazingly smooth. I drive 43 miles into the wilderness on one of the most remote roads in the country, and now I have a rig that I can cut that trip into 1/2 the time it used to take, all thanks to OME suspension

But the rear still rides rough. If I go over a speed bump the front is really smooth and the rear feels as if there's no springs or shocks.

Sorry
But after running two different OME setups/ Ironman and now the JBAs
Just a world of difference. I'm so spoiled I hate driving any other KJ now

Do I have to go over 3 inches with those JBA adjustables? I tend to push the boundaries of rolling this thing as is, so I'd hate to go any higher.

im a bit late here, but as we all know here I have the 2.5" spacers that gave me an actual 3.25" lift. I have Bilstien shocks in the front and stock in the rear currently. I went off-roading 2 weeks ago and the ride was VERY VERY harsh. when I was going 25mph or faster on the trail, the front (although I have heavy duty shocks on) was butter smooth and the rear was constantly popping (overextended) and rough. the ride quality currently is pretty smooth besides the still present bump steer. im looking to install Bilstien shocks on the rear next month.

spacer lifts do ride very harsh but are a great alternative to a full lift kit and are really not intended for long term use. me personally, I don't mind a harsh ride at all! on the trail is the only place I absolutely hate the spacers. and I guess me riding with 50psi in the winter doesn't help at all! 37psi in the spring summer and fall.

http://jeepinbyal.com/liberty-2008-2012-kk/rear-shocks-and-coil-springs/bilstein-heavy-duty-rear-shocks.html

But the rear still rides rough. If I go over a speed bump the front is really smooth and the rear feels as if there's no springs or shocks.

Your problem is running too high tire pressure
plus stock springs which are worn out PLUS you don't have the same amount of up or down travel one des with a full spring lift
Not sure how long you shocks are but springs are not giving you much flex in the rear. With that spacer in there you only have 3-4 inches before they are stacked
Then you get into the whole sway bar issues on the KKs