No,but I would notice the saved weight on the wheels,that´s for sure Also I don´t get how BB change the looks of the bike,but if you mean those two gold spacers,ok.
That might be true,but you could spent those money on much more important parts which you would actually feel.Not to mention that this frame was ment to be tank.
Brake arms are sticking too far out,you should change those conical washers and use the thin one on the inside and thick one on the outside.It would not only look better,it would also work better.
Not really,it´s only about mounts beeing perfectly square and possible crossover complications what´s problematic.Other than that,they are just as adjustable as echo tr,tnn clamps etc.
Not always,BB7 comes with sintered as standard and it´s very powerful brake,same with saint.To the topic,semimetalic should be fine,just give them time to bed in.And cars use the same fluid