I think this is a bit more likely than the Talleyrand plan. It solves of the two problems of the Talleyrand plan. First of all the Netherlands keeps Zeelandic Flanders, which had been Dutch since the revolution (and was partly protestant as seen in the map above) and remained in Dutch hands during the Belgian revolt. There is no way the Dutch would have it over. Secondly, it gets rid of the British protectorate, which the British don't realy want. There is still the problem of the Meusse border. In Vienna it was decided that Prussia would lose all the areas bordering the river Meusse, suddenly a couple of years later Prussia gets a Meusse border again? While doing basicly nothing? Doesn't seem right to me. I think a more reasonable solution is giver the Netherlands all of Limburg, give Prussia Luxemburg and Eastern Liege and give France the rest.
I think this would be reasonable borders ad relatively stable. I suspect a lot of upperclass (and thus Francophone) Flemish will move to France. Probably earlier emancipation of catholics, since they will I think be a majority now, although not by much (it depends on the exact border, are Dendermonde, Mechelen and Aalst in France or not?, I can't tell). The Netherlands will be slightly stronger and maybe a bit richer in the 19th earlier 20th century (although Flanders wasn't terribly rich either in those days). Maybe a slightly larger colonial empire (they might keep Dutch goldcoast, or a larger part of Borneo). It will probably bad for all Flemish living in France now, they will end up like the Flemish in Dunkirk.
For France this will be good, very good. They will have most of the Belgian industrial areas, especialy if they gain more of the Liege province as I sugested. I wonder (and hope) they would be more of a match against the Germans. Although Prussia gains some, the French gains are more significant. A balance of power between France and Germany would probably benefit all of Europe, certainly of both world wars are butterflied away.