The 'unprovoked' part is somewhat fishy. I think it was preceded by some representative democracy bashing. Anyway, let's bury this and move on.
Akroma, don't forget the overhang mandates. Some sciencists predict they will give the CDU the edge here, which would probably have some legitimacy problems.
I don't think too high of our current federal chancellor, she changes opinions a little fast, even though she fares well in this crisis. I don't want another great coalition, either. Black-yellow would have at least some profile of sorts.
If the Linkspartei will end up in government (which I doubt), they'll be forced to adapt their plans to reality. Remember Berlin? After the place got taken over by a red-red coalition, they had to cut even more costs than the previous conservative government, and subsequently lost half their votes in next election. But the Linkspartei as a dominant power... Nobody would even want to enter a coalition with them. See Thüringen, I think.
Good call about the coalition thing, there aren't such things in America after all... and unless a party gets more than 50% of the votes, it's essential to representative democracy.
Concerns I would have about parties:
SPD - You can't trust them not to ally with the Linkspartei.
CDU - They're conservative, which means they hold outdated views on some subjects. They also want to continue with the nuclear energy sheganians.
Grüne - I don't have any. They're stubborn tho.
FDP - That whole liberal stuff, that stuff that has brought us the crisis - this is the party advocating it, pretty much. Although they seem to have changed.
Linkspartei - Basically, all they ever want is stuff that wouldn't last five minutes in reality. They want to end any and all military actions across the globe, spend enough money on social stuff to put government debt over seventeen times it is now, basically populistic bullshit.