I'd love if they go back to their 'roots' and it is hard to say what they are but I'd say it's the Hagnesta Hill. Not because that's their best album but songs like Rollercoaster, Protection, Stanna Hos Mig, Bass Riff, Din Skugga, Saker Man Ser, etc (those in between ones) aren't on the top of the band's list. They're not exactly what you'd call normal.
This album isn't 'subpar' I'd say it's just lacking in stand out tracks. There's Ingenting and then there's nothing (no pun intended). Everything else though is at least decent, nothing is bad. It depends what perspective you look at it through. If you compare it to other kent stuff then maybe it's subpar but if you look at it as if you've never heard a kent song before, it's pretty interesting stuff. And let's face it, things tend to be mediocre in life.