Sure it was more simple back then but with the huge amount of ways to get a message across nowadays there should be no issue with "Super" as long as you have a competent marketing/advertising team.
This isnt a Wii U situation where the marketing was awful during those years and "U" doesnt mean anything to begin with.
Most consumers are smart enough to understand that Super Switch would be a new console if they advertised/marketed it as such.
Wii meant we, but the hardcore gamer felt left out. That's why U meant you, the hardcore gamer. Hence why Call of Duty, Assassin's Creed, Batman and others were used as reasons to buy a Wii U.