Why did you guys sign it then?
Good question. Probably because of pressure of EU, that in one hand - neither can, want or will go in, not to mention war, but even in conflict with Russia, in other - can't leave Ukraine without any help, because there is a possibility to 'lose' it. So it is the best decision for them.
Or PP & co. has some tricky plan how to deal with Russia and it is a part of it, in which i doubt.
There was no representative of the so-called insurgents.
Actually there was, Zakharchenko(DPR) and Plotnitskiy(LPR) was there by themselves. Actually, they and representatives of Ukraine, Russia and OSCE signed agreement