It actually sounds like he was being diplomatic. Praising her strength? Seriously if he liked the film he would have conveyed it in much more specific, stronger terms.
Also there’s this, which could also have been the headline, giving a different perspective of his opinion:
A fan of the Marvel comics as well, Martin, however, is slightly disappointed that the movie's Mar-Vell isn't the same as Mar-Vell from the comics. He shared his two cents on the twist as writing, "As an old (very very old) Marvel fanboy, I am a little saddened that they dropped the original Captain Marvel (not counting Fawcett's Big Red Cheese), the Kree warrior Mar-Vell, from the continuity. THE DEATH OF CAPTAIN MARVEL was one of Marvel's classics, way back when. Maybe that's just me, though. I am kind of a purist when it comes to adaptations."