If you were to design a tone arm, what would it look like and feature?

Millercarbon, it is Frank Schroder. Frank and Peter are in bed together (imagine that!). Frank's tonearms are very interesting and creative. I personally would never buy one. Like Unipivots his designs are a way of avoiding the precision of aligning bearings correctly the result being too many degrees of freedom and variables that are difficult to control. Frank Kuzma's  4 point design is far more elegant controlling all unwanted motions with the lowest amount of friction in an easy to build format. 
Daveyf, you are far too polite. Anyway, I would take the 4 point 14 and try to lighten the effective mass getting it down to 14 grams by using carbon fiber so that people with medium compliance cartridges ( the vast majority) could enjoy the use of a 14" tonearm.

Im woking on a sota tonearm for $127.0000 will get back to you soon with pictures.

Take a look at the SAT and work backwards from that.

@mijostyn  +1 on the Kuzma 4 Point.  Money always matters and Franc Kuzma has engineered a great solution at a reasonable price considering the performance.  It will be my next arm.

Remember the older gentleman who designed a weird tonearm that Fremer covered very briefly at AXPONA? And he needed funding? That arm.