Plane Sailing said:Well, the thing is that tumbling and flanking is already in there, and it is by far the most common way for someone to qualify for sneak attacks. My proposition is to allow a sneak attacker to use feint to create an "imaginary flanker" (a bit like an imaginary friend) so that he might get some sneak attack goodness in on those odd occasions when he doesn't have any real allies to help him with flanking.
So I don't think that is a drawback, it is a feature!
The thing that irks me though, is that I'm a big, huge fan of swashbuckling rogues - or thieves as the case may be - but not very found of a Tumbling/Flanking one. I just have no literary comparisson for such a character, except for cheezy movie ninjas, and that's something I don't want in my games.
Honestly, I think you have a very good house rule, but for me, especially as I also play D&D, I will stick with the Feint rules as they were written. If I find them unbalancing during play I'll change them.