Between Trek literature, TOS, TAS and the movies (+ Abrams movies); I have processed every nuance of those characters lives from their Academy days, the lost years, two five year missions to retirement and beyond. I know you are a Kirk and Spock guy at heart but it is a little bit disingenuous to simply count TV hours and pretend like their story has played second fiddle to other crews in the Trek universe.
To general audiences who don't inhale every single bit of merchandise, Kirk and Spock are the most underutilized elements of the franchise outside of
Star Trek: Enterprise, yet are still the most identifiable part of it.
And if we start in 1987 when TNG premiered, there is about ten-hours of material featuring Kirk and Spock. Yet they are still the most identifiable part of the franchise.
At the end of the day, for me, Kirk and Spock are Star Trek. They always have been. I've went down the spin-off road, watched them all. Ultimately, the spin-offs were mostly forgettable.
Don't you want something new?
"Something new" wouldn't be something based on a fifty-year-old television series. If what you want is something new, then turn to something, well... actually new.
Exactly.