It's not like the A5 at all. In fact the section between Dalston and Shoreditch has pretty low traffic density even at rush hour, space for drivers has been taken away, pavements widened, the section in Dalston opposite Ridley road Market has been treated to create a sense of 'place' where people shop, crossing from the station to the market, driver priority has been blurred and even the road surface indicates pedestrian priority here. Drivers generally move through carefully because of a lot of pedestrian activity on the road.
I suppose, since you are expressing a view on this issue you really ought to have a look. The treatment there may be transferrable to parts of the A5, especially if there is a quiteway and especially if there is a strong function of 'place to hang out' rather than transit