A survey to gauge sentiment about the future of McCarren Pool, which will be redesigned to include a working swimming pool, has been circulating for some time in Williamsburg and Greenpoint. It’s also been posted online, and if you’re interested in voicing your opinion about the pool’s future and what it should include, you can click over and complete it. The three operative principles are that the bathhouse and entry arch must be preserved, there must be a pool and there must be year-round recreation. After that, things are more flexible.