Bottom line, this bill is massively supported by developers, so take that as a gauge of how much power it gives municipalities.
[1] http://48hills.org/2016/05/22/a-terrible-housing-bill-looms-...
But speaking of the affordable housing bonus, Tim Redmond’s specific concerns seem to be that height limits, setbacks, and backyard requirements may be waived, not that there would be any reduction in affordable housing. But I agree that the affordable housing bonus law is somewhat open-ended so who knows what concession a developer might request.
[1]: https://leginfo.legislature.ca.gov/faces/billTextClient.xhtm...
[2]: http://web1a.esd.dof.ca.gov/Documents/bcp/1617/FY1617_ORG224...
By the way, the Legislative Analyst’s Office has released an endorsement[1] of the bill which provides background, justification, and proposed improvements.
In fact, when you look around, you see similar trends nationwide. A lot of this is just the predictable consequence of our near-zero interest rate policy since 2009.
https://www.washingtonpost.com/news/local/wp/2015/03/12/medi...
https://www.rentjungle.com/average-rent-in-washington-rent-t...
This is such a confusing issue, everyone seems to be making sense.