Champion and Beglin are not to blame, they need good scripts.
For me the NBA2K games are the ones with the best commentary, but even they get repetitive after a while.
Their deliver is simply dreadful though.
Half the time they just shout and it's completely unfitting to the spectacle at hand. I have no idea if they could do a good job but it'd help if they were more methodical, slow, and elaborative.
Right now I'd say that Fifa and PES have completely the reversed-style of commentary that they need. PES, as a more methodical game, should have commentary that isn't so abrupt whereas Fifa, which is a more frenetic game, should have commentary that isn't interrupted constantly.
But yeah, I completely blame Konami on this one if I'm being honest. It's one of the things about the game that does make me genuinely question whether the kind of game they've ended up with is in fact the kind of game they want to make. Or maybe it's simply a case of the European branch being out of sync. Who knows.