From these vast lot discussions (Scope differences between biology and (biological) anthropology , What is the most appropriate forum for Biochemistry questions? , Is this site open to questions that are essentially requests for help classifying individual organisms? , Biology.SE and professional biologists? , Is it on-topic to ask for the identification of any living organism? , Plant Identification Questions , Species Identification Questions ) it seems to me, there is a problem of information sorting. (Though I've yet not any problem because I visit all-sorts of questions) but the problem with information sorting is very normal because biology is a very vast field with so-many branches. So peoples want to focus only a particular field (not following a tag... rather follow a stream, may be biochemistry or genetics or botany or zoology or palaeontology etc. etc.) would get their posts shielded with others' .
So, since peoples of all sub-fields of biology, have their right to take part in question-answer, yet that shields content of some-other streams; so I think the best solution is to make some new (beta) branches of Stackexchange, and biology.se , the original site, could be kept as more general questions and highly interdisciplinary questions.
As well, I've seen much deficit of proper tags for specific field, with respect to most other SE branches. For say, yet here (biology.se) there is yet no tags for some broad groups for plants like bryophyte, pteridophyte, gymnosperms, etc. The tag phycology (algae) I've created (though I don't knew then that, new-tag creation is yet not recommended for me!). So quite more specific branches in SE could resolve these.