I've always liked Telecasters, sound-wise, but I'm not the biggest fan of the shape of the upper bout. (Possibly a heretic comment on this forum, but I hopefully I won't be burnt at the stake

) I've been toying with the idea of building myself a tweaked version for a little while, and thought I'd run the sort of shape I was thinking of past you here, and see what you thought of it.
-My mangled version of the TDowns diagram -
If you want to tell me it looks good or bad, that's great, but I'm more interested in those of you with building/playing experience who could give me your opinions on the neck joint. With both cutaways joining quite low on the neck and forming quite a small pocket, will that make it weak, or compromise sustain, or is it just a cosmetic thing?
Any input would be much appreciated.
Mr. B