Why would you need 5 seats? I doubt whether you'd ever fill them and if you did, image all the hassle dealing with 5 different points of view. It was bad enough in a Saratoga trying to decide which type of restaurant everyone wanted to eat at.
Regarding the design I thought pushers and canards had all been disproved when the Cirrus came along. I remember Daryl Stinson giving a lecture and mentioning T tails as being a fashion derived design and they've fallen out of favour now.