ORIGINAL: MTK
I think the E guys have a reasonable argument regarding their recylable/renewable fuel source (bateries). Consider a YS powered model weighed without its fuel. Well, as has been argued countless times before. 20-24 ozs of 25% glow fuel (sg=0.9) weighs over 1 pound and as of right now, that weight is gratis (consumed in flight so it currently don't count.....!?! insert argument here!)
I am a fully E-guy. I have flown electric pattern since I started in 2006. I support the change to a uniform measurement.
All that said, nobody has mentioned the huge weight disadvantage of Nitro 2x2's when it comes to designing for the stresses of being beaten to death by a cake mixer mounted to the nose of the plane. I, personally, don't find the current weight restrictions a problem and having more pilots sitting on 5500g within the current size limitations is an advantage (to me, anyway!!) Who knows, tri-planes are only a season or two away
Maybe, together with the relaxation in weight, one can lose the 1% tolerance, which I suspect is going to become an issue soon.