He's not been great but I think he's brought more to the table than Patterson. He can cross, is dangerous from set-pieces and is a marginally more reliable defender.
Everton's results have improved since moving Young to RB and bringing in Mykolenko at LB, and while I won't claim that that's because Patterson's been dropped (they've won the two games he's started since then), I think it's unfair to class Dyche as a "fanny" because he's sticking with a defence that has got him results. I also don't think we've seen it have an effect on his confidence as he put in a pretty good performance against West Ham after losing his place then, imo, generally did well against Norway too (though I know others disagree with that).