I hit Gen 3 earlier this afternoon then took a break to watch the football. I needed the rest Tbh, I've been playing this game a lot since I got it, not as much as some people mind you, those people who are already Gen 7 when the game has barely been out more than a week on the 360 lol. At a pace of 2 Gens a week, depending on how well I do the challenges of course, I should hit Gen 10 by mid May, which will probably be the time the first DLC comes out, though I may reach it quicker since levelling up to 50 will get ridiculously easy at higher Gens due to the multiplier.
On the current debate I agree, a player doing challenges can end up bringing down an entire team, it's even worse when it's a party doing it, which is just BS. That's why when I want to do a particular challenge, I play a mode where doing that particular challenge won't handicap me or the team, then I go back and play other modes when I want to just play properly. It makes it easier for everyone involved.