TS4 Royalty & Legacy Expansion Pack

One thing that I'm noticing is that it may be difficult to have multi-generational dynasties or royalty "in the background" of your play.  Both the Noble Career progression and Dynasty heir designation require active play, encouraging some small degree of rotational play, even if it's just one or two days every once in a while.

I'm not sure I really see this as a negative, per se, because in some cases it could easily be a positive.  More something to be aware of, and have cheats ready for so that you can hop into a Legacy family for a little bit and "fix" things to a certain degree (somethings may not be easily "fixable" without cheat mods, and other things may not be adjustable at all if you weren't playing the family at the time.)