...passably 'realistic'...
This is where we part ways. I don't need Star Trek to be passably realistic. One of the reasons it originally caught my eye was because it was weird and wild and totally unrealistic. I can look out my window and get all the realistic I can handle and then some.
In a 'realistic' Star Trek, the Talosians destroy the Enterprise to prevent from being discovered. Show over. In a 'realistic' Star Trek, Gary Mitchell kills Kirk and anyone that opposes him well before they get to Delta Vega. Show over. In a 'realistic' Star Trek, Spock is tossed out of Starfleet after he steals the Enterprise in "The Menagerie". New character needed. In a 'realistic' Star Trek, Q squashes the humans like the ants they are in relation to him. Show over. In a 'realistic' Star Trek, the Borg send overwhelming numbers and assimilate the Federation. Show over. In a 'realistic' Star Trek, Picard is never allowed to sit in the captain's chair again after being assimilated. Need a new captain. In a 'realistic' Star Trek, the Borg go back in time in the Delta Quadrant, never encountering the Enterprise or Starfleet and assimilate Earth. Show over. In a 'realistic' Star Trek, Sisko is court-martialed and drummed out of Starfleet for destroying a planetary ecosystem in "For the Uniform". Looking for a new captain. In a 'realistic' Star Trek, the Xindi don't send a probe to test on Earth thus alerting humanity that they are coming. Show over.
I can go on and on and on. There is nothing passably realistic about Star Trek and there never has been. It is a very odd standard to hold J.J. Abrams to. A commander of a nuclear aircraft carrier or sub can't just violate treaties and go wherever they please just because the captain has a hunch. Yet, we see that happen all the time in Star Trek.