Yes but who with?
Maldonado seems to have calmed down a bit, then there are the two Force India drivers Di Resta and Hulkenberg, or even Massa. Unless they go for another rookie. Which wouldn't be a good idea. I think Lotus needs a somewhat experienced driver who can actually bring the car home. Even a non scoring finish can count at the end of the season when it comes to money.
I think they should go for one of the Force India drivers, as I think Massa has done enough to keep his seat for 2013.
Di Resta has impressed me. He's got potential, I think. Another option for Lotus might be Ricciardo (I don't know what his current contract status is). They both seem to be performing a bit above their respective cars' expected level.