Please forget about the image of the British squares at Waterloo just because they were so successful and became so iconic! Though it might hurt a bit, kneeling ranks were the exception rather than the standard. Napoleonic Russians, Austrians, Prussians didn't use them, In most cases the square was considered to be a MOBILE formation. Even in British drill instructions in the mid 18th century there's no talk of kneeling ranks in squares. Take a look here:
A system of camp-discipline, military honours, garrison-duty, and other other regulations for the land forces, London 1757.
https://books.google.de/books?id=YEEIAA ... &q&f=falseSearch for "square". There's plenty of talk of moving square's, none of stationary. It's good formation to retreat if threatened by cavalry and was used as such.
So, imho the poses are just fine. Firing poses can be added from other sets, the uniforms are similar enough.