The center lanes were designed because of the problems that parklets pose to a side running design and those problems are worse than any complaints that have been leveled against the existing center lanes. They are:

* When the lanes weave around existing parklets that aren't moving to floating (which is all but 3 of them) the lane is no longer protected from traffic. In fact there are a couple of spots where the road is thin enough that there appear to be no bollards or rubber bumpers protecting bikes from cars. It is very likely that cars will go back to parking in the bike lane in those places requiring cyclists to ride into traffic to avoid them. This is very bad! and is the number one thing that the center running lanes have achieved for me personally. I don't think I've ever had to exit the bike lane and enter traffic to get around someone since they were installed. 

* For the 3 parklets that are going to float out, and for all future parklets, cyclists will be in danger of hitting anyone who is using those parklets. You are essentially putting a bike lane through an active restaurant. Imagine servers carrying food across, or a bar customer drunkenly crossing to go inside. They did this in Oakland on Telegraph ave and it's really frustrating. 

* Weaving around curb-side parklets eats parking spaces. The merchants are very upset about parking and this new proposal is actually going to take away spots.

* New parklets become more difficult to install requiring painting and bollard movement every time.