On this playthrough I've decided to just wander around Watson a bit before the heist and keep finding streets I've never seen before, even on previous playthroughs where I walked everywhere. This particular street is practically subteranian and its a shame most of the content takes place at surface level or in the main streets when there are great environments like this hidden around the place where most players will never see them.
I agree 100%. The map is one of the things that really stand out in this game. It's just so detailed and fun to traverse that I end up just doing objectives by foot. You constantly discover little areas that are so far off any normal route that I really wonder why the devs even put in the work, but it's a delight every time.