I'm thinking the same, it also just makes more sense to me, not knowing more of the plans that have been mentioned here. I don't want the attention of the devs to be split between two titles when work is coming along so well for this one. Just my two cents.
Oh, don't worry about that. There are various benefits to making it a separate game vs some downsides, but this is not set in stone. For now I'd like to work out what this beach game would include and am happy to hear wishes and ideas.