The consensus is that U/L's aggressive political campaigning prior to the vote backfired big time. They really screwed up on messaging by not understanding their audience. Had they made it about losing 10,000 jobs, they might have won. Hell, if they had just not called people multiple times without consent, they might have won.
There are multiple efforts going on as a result of the vote. Former U/L drivers are trying to put together a rally. A non-profit group (Ride Austin) has sprung up to replace U/L. Certain council members are trying to fight the rest of the council. The state legislature is consider a bill that would pre-empt city legislation.