I thought about removing the Cuirassiers from the Hundred Days list, but of course they *could* have been involved, had Kleist's V Korps seen action. (Although I suppose one could argue, then, that if that were the case, the "Elite Infantry Abteilung" ought to be available, too, since there was one in V Korps as well.) I'll think about providing an option for that.
As for the Uhlans; I have the ratings for them in the Unit Values on page 112, but I resisted creating an "Uhlan Brigade" support choice because... well, there was no such thing. The Uhlans were invariably dispersed among other cavalry with no rhyme or reason: 2 Hussar units and an Uhlan unit in this brigade... a Dragoon here, an Uhlan there...
I suppose it might be a fun Optional Rule to allow a Prussian player to substitute one of his Hussars for an Uhlan, if he wants.
The one that gave me the most concern was the Landwehr Uhlans. Some Landwehr cavalry had lances, some didn't. And again there was no rhyme or reason as to when they might. I finally decided against creating a "Landwehr Lancer" unit for the Army Builder, simply because I felt that giving them the extra 2 dice against an infantry square was an exaggeration of their capabilities.