This sounds crazy but it happened with Black Mirror which was also a UK show, after watching Black Mirror and finding that out it crossed my mind that maybe the same should happen with Primeval and Primeval: New World. Have two more seasons or so to finally conclude it before any of the actors age.
I think it would be great if it gets picked up by Netflix because it may give the show a bigger audience.
Ithink that even though it is a relatively old show , the original primeval does have potential for being revitalized in a netflix exclusive final season, or maybe even hulu. And i also think that there is a small chance that if the revitalize the original primeval they may possibly renew new world for a second season.