I put 900 hrs into Empire and loved it. However its unfortunately got a seriously flawed grand campaign that has both Save breaking issues and crashing issues. You might also find for example that the pirates late game will cause crashing, due to provinces they take in the Southern Americas. Darthmod can add to campaign issues unfortunately due to the size of armies it can cause, which again after many turns can cause ai crashes. then theres the siege battle issues, which can be worked around with no fort mods.
But all in all its a classic flawed diamond and at some point you'll realize Napoleon may be the better option. Despite losing the far better campaign scale, it also avoids siege battles by default and doesn't have game breaking campaign bugs. CA are a bizarre developer in many ways and very capable of releasing games you can end up loving and hating in equal measure.