Well, assuming the Dutch go nuts and join the war, silly proposition, as described above, the Germans can move through the Maastricht appendage and funnel around Liege sooner, surrounding it without have to worry as much about it holding up the various armies. Also the Dutch, while not useful in the attack, could prove to be invaluable for holding down Belgium as occupiers, mainly by being sympathetic to the locals. Also, they could occupy Brussels and surround Antwerp, freeing up considerable troops for the right wing of the German advance. Beyond that, Dutch troops could be used to help screen Verdun as the 5th army moves on, freeing up 2-3 corps for use at the front.
All of the drawbacks of the Dutch presence in the war could be made irrelevant by their presence in the war. The Belgians then would not be able to flee Antwerp, as the Dutch could put enough men in for the siege that there will simply be no exit to slip through, which the German had left open OTL, as they did not have enough men for a proper siege.
This is huge, even if the Germans retreat at the Marne. Without Belgian manpower and with the capture of the King, Belgium could very well exit the war in 1914, leaving the British to hold the line at Ypres, which they would be unable to, and the additional Dutch manpower would give the Germans an even greater manpower advantage during the race to the sea (not even counting the loss of the Belgian troops).
So the war may not even last long enough for the blockade to really take effect. Indonesia may not even be taken and in fact, they would be able to get it back at the peace table if they have France as a hostage. While it is true that the French were keep fighting if Paris fell, it would be a severely blunted war effort, especially as the British don't have enough men in the field to compensate for the loss of the French industry and its effect on any surviving armies. Indeed Moltke's plan might work under Falkenhayn, leaving the French unable to launch offensives, while troops transfer to the East to save the day in late 1914.
If the race to the sea ends with a German/Dutch victory, which it probably will, the British will be devestated and forced to flee the continent (to return of course), but the question is where then the line reforms? The Germans and Dutch have a lot of territory to occupy, no doubt, but they have a decisive manpower advantage, one that may very well allow them to restart the maneuver war beyond the Somme river. With the British out of the equation and the Dutch tasked with holding everything behind the lines, the German can focus their strength on cracking the French line in October/November and rolling them back. This time the rail lines will have been restored and logistics won't hamstring the advance. The French can just withdraw if the line is breeched, but they are low on munitions and trained manpower and really cannot afford to let Paris be besieged again for practical industrial reasons and morale concerns (1870 all over again).