There are quite a few name differences between the JP Digimon and the localized ones, Tailmon/Gatomon merely being one exception. I'm glad that you're with me on using the localized names, especially because there could be players of this patch who love the cartoon with all it's English names and want to jump into this without wondering WHO THE HECK IS TAILMON? and getting irritated because it's Gatomon.
One problem: A lot of people who play the games, are fans of the Japanese names of Digimon, so you're bound to get angry fans yell about the English names. I personally prefer the Japanese names, as some names make no sense.
There are also a lot of problems translation wise, like making names even more Japanese.
I understand your point but,
In my opinion. I want to play a translated game, therefore I want to see the translated names which i can related to with the series. Im sure alot more people would get angry over the japanese names because of confusion than the other way around.
If people really want to throw a fit over the english names they should learn japanese and play the japanese game.