Thats how Trek always does it - broad strokes, picking and choosing which bits to follow and which to ignore. Look at The Motion Picture - everything looks 100% different, the Klingons are unrecognizable, yet it's a continuation of TOS/TAS. Look at Zefram Cochrane - the guy in "First Contact" is nothing at all like the guy in "Metamorphosis", yet Kirk and Spock recognized him.Man! Rehashing Khan?!
That's like the Batman franchise rehashing The Joker! There's NO WAY they could make that work a second time around. I mean, The Joker IS Nicholson, and...
... wait, what?
Nicholson? JACK Nicholson? You're kidding me. You mean there was a Joker after Cesar Romero?
The next thing you're going to tell me is Adam West is no longer Batman.
The difference is each time for Batman its a reset, with no acknowledgement or consequences with what goes before or after.
Adam West didn't turn up to hand the keys to the Batcave over to Keaton.
Trek, through Nimoy is at least pretending to be a constant, when it suits it.
Voyager continues on from the prior series, despite the speed/distance ratios in that show being totally different than what had been established previously (TOS could have made their journey in a month)