The main advantage (only?) of acid wrapping a rod is that it does away with the rod twisting/torquing as the line, under load, tries to straighten out. The higher the guides are above the rod, the more twisting force is created. The tall Aftco WO's are a good example and a lot of times you'll see your guides, especially towards the tip, twisting and turning sideways. If you don't have to fight the twisting, the fight becomes easier. Also the twisiting puts additional, torsional, stresses on the rod blank and guides that are really designed to stretch on one side and compress on the other. I'm not an expert, but acid/spiral wrap actually seems to be the most correct way to put guides on a rod. The line is underneath the rod where it should have been all along.
The only disadvantage I've heard of is that some headboat fishermen feel that the line underneath the rod is more vulnerable to getting cut when fsihermen are doing the Tuna shuffle.
Fred