At this point, i actually prefer to see new episodes where Bart is an antisocial mennace over episodes where he is emotional. Because for the last 10 years or so, Bart's bratty antics has consistantly been completely overshadowed by Homer's jerkassness. In earlier seasons, Bart used to be the resident "evil team member" of the Simpsons household (in other words, he was the most selfish and cynical of the five main characters, The Simpsons equallent to South Parks Cartman or Family Guys Stewie if you will), while Homer was very much a lovable oaf who only caused chaos and destruction due to his stupidity, not due to intentionally doing so (in contrast to Bart who, much like Bender from Futurama, would never miss an oppurtunity to do wreck havoc simply because he enjoyed it).
This older dynamic worked a lot better, because Homer and Bart had different comedic roles: Bart was the antisocial one and Homer was the stupid one. Since about season 11 though, Homer has been both the antisocial and the stupid one, and Bart has pretty much just been "like Homer, but less so". Antisocial, but not as antisocial as Homer. Stupid, but not as stupid as Homer.
And all to often, Bart more or less just acts these days like one out of the three (or four, if we count Maggie, despite not having much of a role at all) "sane" family members who serve as counterparts to the insane Homer.