It's somewhat bittersweet that this is already gonna be the last game in the LoS universe; I would've liked to see them make a nice trilogy on consoles with maybe 1 more portable entry after MoF (and, ideally, LoS-3 being a launch title for PS4/nextbox). However, I understand that it's wise for them to leave the series on a high note, rather than drag it out until LoS-4 or 5.
Kinda like how Seinfeld ended his show so abruptly, it being the highest rated show on TV at the time. He wanted to end it while it was still "good."