There's a new update out today for CoH. I'm not sure of all the kewl features yet, but just found out about this one. I guess there's a mission slider now, here's the details.
The mission slider makes your missions harder. The first level higher gives you a normal mission with more mobs in it. The second one up gives you normal numbers, but at +1 levels. Third up gives you +1s in increased numbers, and the highest setting gives you normal numbers of +2s and +3s.
Here's a link to the official updates page.