I don't think the series ever got bad. I don't share the thinking that AC6 was bad. The story was disjointed and unfocused, but even AC5 could be accused of that at times. At the end of the day AC6 was still good. The Liberation of Gracemaria is one of my favorite levels in the series. Just the epic scale and feeling of taking the war back to your capital city complete with that awesome music! Just great.
I don't even think AH was terrible. I think it's actually a succsesful attempt to appeal to western fans. Yes the helicopter parts sucked, the music was muted and not full of persoanlity
(though I like this track), and the same could be said for the story.
Still, the gameplay was good. Dog Fight Mode was a little overbearing sure, but it wasn't a terrible idea. Perhaps being tied to some sort of killstreak would have made it better. It still could make from some thrilling scenes, but it would be nice if it was less automated.
And Jesus the graphics in AH are awesome.
But I'm not interested in the series being this F2P thing. I don't think that actually signals the end of the series, but if it does and we don't get a return to Strangreal then well I'm out.
Though I would love a remake of the real AC3. This time released in America.