If a gestalt character is granted the same class feature by both classes, is there a RAW way to trade one out? I'm assuming not because the gestalt rules state that if the two classes have aspects that overlap, you choose the better result -- if the results are the same you would only get the result once.
The particular example, our party's Scout//Swashbuckler is planning to take a Rogue dip on the Swashbuckler side. He will end up being granted Evasion by both Scout and Rogue at the same time. He was hoping to be able to sub one of them out for another relevant ability (such as Improved Evasion). Would it make any difference if he were granted the same ability at 2 different levels? Or even if he were a regular multiclass Scout/Rogue, gaining Evasion for the second time?
Edited to add: AreAre there ACF options available for either the Rogue or Scout that replace Evasion, and if so which book(s) do they come from?