Yeah the Klingons changed over time, but once you they have a Klingon in the regular cast it’s kinda set at that point.
Worf is THE Klingon now. All other Klingons will be compared to Worf from here on out. Sure there can still be some variance, but if they stray too far off from Worf, they’re asking people to choose which is the real Klingon: Worf or whatever they’re putting up on the screen now. The answer will always be Worf is the real Klingon, and the new version is not a real Klingon.
It’s just how it is, and it’s really insane they tried to stray from Worf too much under the excuse that Klingons were changed previously. Yeah they were changed previous to a Klingon being a regular cast member on two popular Trek series.