Stealth pushes Vayne to perform in more of a team-oriented roll rather than be like
and split-push 24/7 because good at 1v1 and terrible in team-fights.
If anything, Vayne should be changed to be a better team-fighter and worse duelist so she isn't as oppressive in a 1v1 and she requires more team-spirit and less lone-wolf attitudes.
Also - removing things from a kit isn't balanceing so much as re-working. Balancing changes largely involve raising or lowering the existing numbers in a kit, the Xs and Ys, not adding or removing mechanics.
Doing something like, say, raising the mana costs on Vayne's skills so her early game is nerffed, more costly, and allows more opportunities to punish her would be a simple way to balance her.
Stripping parts of a champion's kits and removing part of how they work because balance is a fast way to punt meta picks into purple caster minion territory where they have no identity and they're completely unusable.