your bike looks awesome very clean build
the issue with the rear brake is not stopping power that should be fine
the issue is it is just the wrong way to do it.period.you could never sell a production bike with a rear brake like this
.if you were to try,ON PURPOSE, to come up with a SHITTY-ER way to hook up a brake i swear you could not,i defy anybody to hook up a brake in a worse manner , :-[ OK maybe use a bungi cord instead of a rod
people do it because they are either lazy or don't know any better
not being able to have the brake pedal return to the same position but instead having it move wildly on every bump will suck
without an upstop (which on this lashup is impossible because you will thren have bump activated braking :
),on the pedal you cannot adjust the pedal travel,the pedal will always have a ton of travel and as your shoes wear it will increase
plain and simple it is just a totally bastardized way to do it , especially when doing it right is sooo simple, really
and hey i am not picking on you ,you saw it done and copied what you saw...
rise above the spodes, hook it up right, your bike looks too good to be hobbled with such nonsense