Filter involved issues
I'm not confident whether this is the expected behaviour of this setting. Do you know if it's implemented this way for other services?
That is, someone might plausibly want involved issues to be included, even if they're excluded by filter rules.
Another boolean configuration I guess?
I think it makes sens for the filters to apply to everything but I would like to argue against an other boolean setting. If you want to pull all involved issues, you can add a separate section in your bugwarriorrc for that.
Now also filters directly assigned issues as well.