I'm afraid we're probably not going to do more content for Lake of Voices. We're really busy trying to finish Our Life and XOXO Blood Droplets, plus Floret Bond. We have to let LoV rest and complete new projects.
But there are other fans who feel the same way as you! If you're interested, you can check out this really nice Guide/Kikka fanfic that was made a little while back-
https://archiveofourown.org/works/21726292