Napoleon has also fought three major battles and two minor ones (Quatre Bras and Wavre) within four days. How many effectives does he actually have?
His troops are going to be tired and probably hungry (foraging will be difficult).
He needs a breather but he needs to be in the right place to do it all again in a week - and that place is not the coast of Belgium.
Maastricht is better but Liege will be garrisoned and Napoleon needs to beat Blucher again in open battle.
Feint towards Maastricht and hope Marshal Vorwarts lives up to his name.
Waterloo and Plancenoit (and the fighting at Wavre will probably cost the French some 15000 casualties.
The current position of the French army is
1 Napoleon with the army that fought Waterloo and Planchenot now concentrated at Brussels, taking a much needed rest! A couple of days is probably all there is time for given the strategic neccessities
2 Grouchy's command now in he Louvain area.
I am leaning toweards the idea that Napoleon will go after Blucher in the Maastricht area and attempt to defeat him decisively before he can be reinforced by the Prussian Gaurd and two more corps of the Prussian army. That would secure Napoleon;'s northern flank when he fights the Austrians and Russians in early July.
Going after Wellington at Antwerp, at least immediately is, and this certainly appears to be the general consensus a bad idea for Napoleon.
Abandoning the Belgian campaign at this point would be an admssion of strategic failure. I do not see Napoleon doing this after his recent victories and the capture of Brussels.
This leaves the Maastrict option and an attempt to draw/force Blucher's four corps into a decisive battle before the Prussian reinforcements arrive and before Wellington can intervene (joined by the Danish Contingent) If the latter were to happen Napoleon would face a Waterloo situation n the Maastricht area only with Wellington playing the role Blucher played in the OTL Battle of Waterloo and with much the same outcome. Napoleon will have to launch the Masstricht Mounouver very soon both to avoid this situation, fight Blucher before he is reinforced by the rest of the Prussian Army and before the Coalition invasion of Eastern France really gets going.
Blucher, being an agressive general might very well decide to fight unless Gneisenau can talk him into a more cautios strategy.