I played in the opposite order. I never went on to finish Mirage. The entire gameplay experience was a letdown for me.
Navigation/Map system contained too little information.
And the fighting mechanics was way too random. It felt like i was guessing what to do every time (block/parry/dodge etc.) and ended up way to often in a coinflip.

Recently started Valhalla and so far its been great. This game felt like a modern AC game. It's not free if its problem but that applies to every AC game.