Interesting idea. Keep in mind all these kind of things can be gamed. For instance, anyone can get a vote from eg the minnowsupportproject vote train, it is a free to use self curation service, meaning you send your URL to them and the vote with their followon vote train, generally 50 votes. Users can also get 2nd and 3rd account and let these vote for each other. You can also make agreements with other users to vote for each other. Some initiatives are already started; I received one or two invites in private chat from those who are setting this up.
On topic of meaningless and meaningful: this is very subjective; ok, some posts may be meaningless to everybody, but maybe SteepShot generate posts could be meaningful to SteepShot users, but meaningless to Steemit users (those who go for quality writing.