Tactically, the gangs are still quite retarded. They used phones and have no discipline. Plus they're known criminals and are of course monitored. They still haven't a clue about weapons. I see these gangs as being under control for the time being.
Police accuracy has fallen off due to a combination of lowered standards and automatic pistols that don't have optimal characteristics for accuracy. Remember in NYC they shot that one immigrant I can't remember dozens of times at close range and only a few rounds hit him. Over a wallet.
It is hard for someone from mainstream America to understand the motivation to engage police in combat but if you lived where the gangs are, or was harmed by any of the tin badge gods as they asserted their authority over you through broken bones, planted evidence, or tasered then it's hard not to be motivated to strike back. Even if it is because you're being arrested for selling government imported cocaine.