Review Word Limit Needs to be Changed

I have a big problem when it comes to reviewing films, in the fact that, I get to around 700 words and still have a lot I want to talk about when it comes to the film. It's the same with television shows I watch; I like to review season by season, rather than a joint review of the whole thing - especially if I stop watching a television show at a certain series. 

Is there any way to have the review word limit changed - maybe people can check a box and these are longer to be processed, or there's an easier way to review things season by season?

It's hard to do, especially when you've spent so long on a review, it gets annoying when told the word limit is too long and you have to condense it and take a lot out of the review.