I R MarF
Smash Ace
Idk about Brawl, but they both meteor in Melee which seems more helpful. However, I do like the idea of giving them a spike, but for Popo's fair; not Nana's.I can't really say anything about Ice Climbers regarding balancing, considering I know very little about their metagame.
However, I do think vBrawl Fair had a nice idea behind it that could be adapted to Melee Fair, IE turn Nana's into a true spike.
That's about it.
The reason being is that you can easily get a meteor out of a throw with IC's and not being able to meteor cancel that would be ridiculous. Another way Nana having the meteor would be more balanced is because both fairs connecting would result in a meteor trajectory since Nana hits second. This means that for the price of extra damage, the fair can be meteor cancelled.
In a sense, Popo losing Nana would then give him acess to an ability he normally wouldn't use/be able to use, which is a stronger gimp game. Something he needs as SoPo since he loses the damage output and imminent grab respect.