Hello,
it's not just about the state of the sim. SH IV was not especially developed either. SH3 would look awkward meanwhile without the mods.
The problem with SH V is the internet connection requirement, which is so interwoven with the game that you cannot leave it out judging the sim.
And then the internet connection or UBI servers fail all the time leaving you unable to play, also destroying your online-saved games now and then. And they call it a feature

This is why UBIsoft gets fire from all directions .. and rightly so.
Greetings,
Catfish