You did exactly what you should have, skid plates and sliders. I would overwhelming suggest to replace the tires while you can still find a buyer, only because inevitably you'll be replacing them on the trail once a sidewall is punctured. It's also a problem because once you air down, you're losing considerably more ground clearance which we don't have in excess to lose.
I wouldn't touch the factory suspension unless you've added excessive weight to the the nose (winch or bumper). I've driven several hundred miles off-road in the PNW and Moab, the only reason I'm interested in a lift is to regain the clearance I lost while adding 200-lbs of weight, directly over the nose as that reduced my clearance .5-.75" over stock. With any lift, I want nothing more than 1.5" which will put me only slightly over stock ride height and on a spring that's not overbearing for load (and/or) reduce wheel articulation / place the CV's at a compromising angle at full flex.
Also, tires alone won't increase your overall general clearances by much. As stated above, even a substantial increase in tire size only lifts the vehicle by .5-.75".
I'm also surprised they didn't upsell you. Most companies don't care, and would have had you out the door with a full BP-51 setup.