I am not sure what you're talking about. Some changes are definitely WAD. We have our own spreadsheets, but always we're open to suggestions.
The problem is that we are constantly working with two different objectives:
- gameplay
- historical adherence
Sometimes those are at odds and sometimes we chose one over the other in one istance and the opposite in another (usually because for some values we think gameplay is more important and for others historical consistency is more important).
EDIT: and sometimes having an upgrade with both bonuses and penalties is WAD too.