I have no idea what you're trying to say ... perhaps you mean 'mapping numbers in files to the enumerated in-game appearance is likely to desync when someone adds more appearance sprites'
To that I can only say, it's a very minor problem IMHO, and I look forward to having a reason to solve it.
OTOH, I imagine what 54x is working on will be a lot more thorough. (I've skimmed the thread) so I'm looking forward to replacing my change with his.