I did that route in December '07. So I cant realy comment on the current situation. But...
1. Apart from nomansland at the border between WesternSahara/Morocco and Mauritania (a two-three kilometer stretch with NO roads. Just sand and rocky tracks. Stay on the tracks because of mines!), there is pretty good tar road all the way. You may encounter a detour or two, but those detours will usually be good enough for a regular two wheel drive to drive on. Mali's main roads are pretty good tar also. So apart from no mans land Morocco-Mauri the drive should cause you no problems.
The rest of your questions require recent knowledge about the coup, which I unfortunately don't have. But I am sure someone else here has.