What was the Dutch navy like at this time? Might it help provide a better counterweight to the Royal Navy?
When looking around the internet i found out that the Dutch Army consisted of 4 divisions, I can't find any information about the size of its navy. (i can find only sites about the dutch navy during world war 2)
The Dutch weren't too hot navally (numbers-wise, anyway). I'll dig out the figures, but essentially, there's nothing more imposing than coastal battleships. If the war's delayed by four years or so, there'll be a small but dangerous battleship (German built, 20,668t, 21knots, 8 * 13.5", 16 * 5.9", 12 * 75mm) guarding the Dutch East Indies (quoting Conway's: "had the programme been adopted, the first ship would have been laid down in December 1914 and complete in 1918."). Otherwise, nothing substantial, really. Their light warships may prove handy to the Germans, as will the basing, I guess.
Dutch Navy in WWI:
6 Coast defence ships built '94-'06, and having no more than 5,000 t
4 obsolete cruisers ('96-8) of under 4,000 t displacement
18 obsolete Torpedo Boats ('87-'04) of 140t of less
Modern:
1 coast defence ship (6530t)
Quite a few destroyers, subs and various small craft, though completion of many was hindered by wartime limits
The Dutch could have supported the Imperial Navy to a certain extent, had it been an ally. But there's little motivation, if you ask me. Holland can't defend or resupply the Dutch East Indies - which are far more valuable than Germany's colonies. And given RN naval mastery, any other provinces are open to conquest. If you could kick-start the plans for naval defence to '08 or so - in response to the swelling IJN, then you might have a full squadron of BBs or BS with 12" guns in the Indies. Whether they could stop the IJN (their likely opponents), I don't know. But they can certainly hurt them.
As for helping the Entente, that's the more probable course if colonies are considered. But it screws them over re the homeland. I think Benedict has pointed out in the past that Belgium was sympathetic to A-H's claims v. Serbia . . . and only got driven to the Entente because of the invasion. Best option with Holland, too, I agree.