Navigation:
I love the emptiness and eeriness of the city, and I think this game can totally work without a map system. However, it can be a real challenge sometimes to actually find areas of interest. To address this...
-I think drugs should be more abundant, found somewhat frequently in garbage or perhaps reliably in set locations such as the skate park, perhaps with a tradeoff that you take damage if they're not bought from the dealer. They're important and very fun way to find locations... but the only reliable way to get them is at the foreclosed house, which is very hard to find and I think isn't even on many of the maps, so you could be searching for 20 minutes for something that isn't there in the first place. And since there's no consistent/reliable way to get money, you could show up there and not be able to afford anything.
-Though you can find a tab of acid infrequently in the garbage, I think it's a missed opportunity that you always know that it's going to take you to the Konbini. I don't know if the dealer sells any like what I'm about to describe, but I think it would be a positive addition to the game if you could get drugs that lead you to a random, existing landmark. That way there's a good chance it leads you somewhere you've never been in that run, while maintaining the mystery and danger and delight of getting lost.