Delta and 4x4 Labs are playing in different leagues as far as design, engineering and strength goes. It's a T-ball vs MLB scenario. Liability is the reason for the hitch not being incorporated into the bumper, and as a business decision that makes complete sense to me. Having the bumper designed in a way that allows the use of the best available hitch on the market (Slee's hitch) was a very smart move on Delta's part. Gives those that want the hitch the abilty to add it, and those that dont want it, dont need to buy it, all without adding liability risk to the company...same model that Slee uses on their own bumpers.
Regarding not looking clean...sorry, I'll go wash the red dirt off and add some instagram filters for you.
You sound a bit bitter on Delta for some reason. Any bumper that you want to have an integrated and traingulated hitch installed for real strength is going to take up the same space that an AUX long range tank will take up. That's a priorities decision that each person can make for themselves. I personally would rather an LRA main tank replacement to keep the weight centers between the axles. Once you drop down out of the Delta/Slee caliber of bumpers, the intergrated hitch offerings are basically a peice ir 2" square tube welded into the shell of the bumper....not the most stout design, but good luck with you Labs, they work fine for lots of folks.