Smallville Season 8- Can it survive with Cast Changes?

http://www.buddytv.com/articles/smallville/who-will-stick-around-for-smal-16771.aspx

New Article on BuddyTv speculating about if Smallville can do an 8th season without Michael, Kristin and Allison- my favorite line:
“Could Smallville survive without Lex, Lana, or Chloe? Though some people are fairly tired of the endless Clark and Lana drama, she does seem like a character that’s rather essential to the series. [...]