Very well said and thoughtful post. You make an excellent argument about comparing the subsequent iterations of this game to a house with a rickety foundation.
It's not like Ubi hasn't known about the bugs in question from /3 to /4 and now to /5. There really is no defensible argument they can give as to why the same ones continue to appear with every subsequent release of this game.
It's obviously a conscious decision on their part not to correct these glaring oversights, the same oversights and bugs that have plagued this series through many iterations. Which begs the question...WHY have they not fixed these things?
I'm afraid we will never have an answer to that one.