i guess it depends what angle you would be editting from. in this case you are suggesting editting an OT to fit with themes and visuals from the PT, which would be interesting to see.
personally i would argue a less flashy lightsaber duel with more banter creates a greater depth emotionally, ie luke's run at vader in ROTJ after holding back all film.
back to the earlier point though, it would be interesting to see. i'd argue for editting down the ep III duel a bit, and maybe recutting the ep IV duel to make them fit each other.