Hi Karl,
I don't think taking a 44 lbs lift Ranger and using it for twin Al 80's is excessive hot rodding of a limited platform. The tanks mount securely, there is sufficient lift, and Zeagle states that the unit may be used with either a single or double tank configuration. Now some manufacturer claims can be out to lunch, but this isn't one of them.
I could see your point if someone were planning on using large steels, or carrying stage bottles, tech diving and the like. There are several tech divers here that use the Ranger for tech diving, but with the 65 lb bladder. And some of them have tried the bp/wing and gone back to the Ranger. However for recreational twin diving, the Ranger is not an unreasonable choice.
As for the cost factor, I purchased a bp/wing setup last year for much less than my old Ranger Tech set me back.
If you like your Ranger, keep it.... I prefer bp/wing, but that's me, the Ranger will suffice for the Al 80's.
chris