So way to many comments for me to read them all i'm afraid but my suggestion is a new steemstem account that resteams posts. To avoid the main one being clogged the new account would resteam. There could be multiple e.g. physics resteem account and biology resteem etc.. probably best just a few, say 5. That way people wouldn't see content they have no interest in as they would all relate to the topic they choose to follow.
Resteeming is the best way to share content imo. And if your not upvoting or upvoting by a small amount as the resteem accounts would have little SP less people would try to abuse the system. Resteeming also encourages others to vote on the content. Also if you have a policy like steemstem-physics-resteam (a better name is a must :P) will vote on resteamed content after 3 days it encourages others to vote as they receive some curation. You COULD also say you only get a resteem if you follow the account but i'm not sure if that would be a good or bad thing.
Sorry if already suggested.
You suggestion is not realistic. We are already over-working, and you asked us for more work...
But the problem was really there: the visibility of the posts we upvote. Thanks for pointing it out. We have found another way, as explained in our next post. Please let us know your opinion on this :)