Strictness of the retail authenticity

[shigukahz]

As the title indicates, how strict are the rules for code that is under the hood, for instance, I was looking at the bonus that is on Capacity and Experience rings, and because it is int16, going above the value would crash the server, which makes sense because the highest bonus in retail is 30000, https://www.bg-wiki.com/ffxi/Endorsement_Ring as an example. Is changing the int16 in charutils.cpp to int32 so a higher bonus can be applied, something that is acceptable and worth raising a PR for, or is it a no go situation because retails max is clearly below 32,767?