Well, those were deliberately chosen to not be relevant to gameplay, while providing an in-universe explanation as to why there would be ratmen despite being purely bad characters.
but really, it's mostly that I don't see why mechanical bonuses are necessary to make good characters, or playable ones. If you feel a character must have arbritary bonuses to random elements of the game, then I think I'd rather sit it out. Nothing against you, I just don't see why having a particular +1 is so important.
Is it?
Mostly, it's just that the way I see it, everybody is going to have something that they're relatively good at. It may not be something that other people consider valuable, it may not even be something that they consider valuable, but they're good at it.
The way you've described your character, it only makes sense for them to be good at hiding, maybe good at escaping. Being completely worse at everything just doesn't make sense.
If you really don't want your character to be have anything that they're really skilled at, ok, so be it. But don't give them extra maluses on top of that.
Yeah, but characters in forum games are good at all kinds of things they really wouldn't be able to do normally. They have special abilities, it's just not usually thought of that way.
Some examples of things that can be done simply because of necessary and fun game conventions:
You can, for instance, try to operate machinery you've never done before, or even seen before, and you have a chance of succeeding, even when a real person probably wouldn't. This applies to a great many things. Nobody is going to make a masterful painting or cook a legendary meal, but a game character with no skill is generally going to be perfectly capable of doing so, even if the character doesn't do so reliably.
Almost certainly, certain biological functions will be ignored, as will things like living conditions and lifestyle expenses. This is done because those things are boring, but it's a serious concern to a great many real people.
Same with other things. You aren't (usually) going to spawn with career obligations, favors owed, or any of the deep roots that people can draw strength from or deal with. Game characters have a huge degree of freedom to go places, to do things, and to make decisions that none of us will ever have. This happens even without any abilities as such.
So no character is 'worse at everything'. Unless you are in a situation where not having a bonus in something specific is an incredible hinderance, such as no defensive powers in Jeoathica, I don't really see it as necessary.
That leads to the next thing. I still should have something that helps define a character, particular with a thin backstory like that one, both to myself and the GM. That's usually done by producing or listing bonuses, but it can just as well be done with appropriate weaknesses. Can a character who is thoroughly unsuited for physical confrontations while being physically frail be used as a defining term? Sure is! It means he'll actively avoid such confrontuations when encountering them, preferring to talk his way out of problems and avoid people who are particularly good at attacking his weakness. There are many characters like this in fiction, both heroic and villaneous, and there's room for one more.
If you insist on it, though, you can remove those penalties. Someone doesn't need to be physically weak to want to avoid physical confrontations, after all.