All I said was IMO having mids ONLY in the front doors is overblown. The OP asked about whether he should use 2way or 3way speakers and IMO it's not going to hinder him either way. I think my stage is as accurate as one can hope to achieve in a car. With my eyes open or closed I do not hear vocals/guitar coming from my feet, only from the center of the dash except for when the composition calls for it to shift. I understand the concept quite clearly but music theory is as complicated as rocket science for which I don't have a degree in either. I can only go by what my ears are telling me.
Anyways, if it doesn't sound good to you who am I to say what you should do or think.
Some like their highs wailing, others want the most obnoxious bass you can achieve. Most want something that is pleasing to hear at all volume levels. It's all just a matter of taste.