"I continually have a couple problems though. One is I continually hit my nose with my bowstring (not all the time, but it comes and goes). Second is I battle hitting a couple inches right all the time (I'm a lefty)."
I was just discussing this with someone else in a different post. Like you say, the nose hitting "comes and goes" and finding a definite cause seems elusive.
Less so with the hitting right (or in my case, left). I think I can almost always trace that to having my shoulders alligned to the left of the target (for a RH shooter). When I allign my shoulders properly, the shot moves right.
There can be only one "cause" of hitting your nose with the string, and that is that you are not coming off the string cleanly, and so the string is deflected into your nose. Of course, I can think of more than one error you might make that would cause you to not come off the string cleanly, but that's what they are: form errors.
So, under the glass is half full theory of life, you can look at these two problems as blessings: whenever you hit to the right (in your case) or hit your nose with the string, it is an early warning that your form is falling apart somewhere, and you need to correct something. Would you rather not know about it, and just keep making the form error under the ignorance is bliss theory of life? I know, it would be nice if the message could be sent differently, perhaps by a little buzzer going off instead of the string hitting you in the nose.
In answer to the question you pose in the title of your post, it's not likely that I'll switch back anytime soon. It was too darn much trouble retuning all my bows for 3 under! The main reason is that I really do seem to be shooting better, so I guess I'll just accept the "early warning system" for what it is.