Nobody in France or Germany will be remotely interested in "taking over" Greece. Its like saying "hey, I got here a bucked of problems, want them?" Well, no, thanks!
The sovereignty of all European countries is "weakened", that's the whole idea of the euro. There is another level of supervision, and that is really good. Not only in Greece, also e.g. Germany constantly gets told from EU institutions or the EU supreme court to change laws and regulations or to watch the deficit, etc. That's a good thing. Of course the politicians don't like it, takes away some of their power.
Greece has vast opportunities, if they would get their stuff together. Solar power alone could be a great industry in Greece. There is a plan called "DeserTec", with several large EU corporation planing to install a hundred billion in solar cells in Northern Africa. If Greece was smart, they would jump on that train. But they are not, apparently. Its easier to borrow money and whine on payback time.