I know a lot of people here think EJ is just putting on an act of the "good boy" to get back in Sami’s good graces but I don’t think so. I think the writers are intentionally trying to reform him. Otherwise, we’d see those snide little looks and remarks (like Kristen makes) when he’s alone.
Now whether or not he will stay reformed is anybody’s guess but I really don’t think it’s an act. And I’m not even sure yet if I like him like this. But they’ve reformed other bad guys…Bo, Jack, Patch, and look at Victor, he’s almost a milquetoast now.