Performance is acceptable on my PC, though I still experience occasional hiccups and there is no official ultrawide support.
Overall the pros of exploring the vast lands, being in awe of the amazing sights, and the epic boss fights heavily outweigh the cons.
In conclusion, we are all maidenless. If you don't see an improvement in yourself during a boss fight after 5 attempts, it's time to go do something else and level up in the game. Maybe even go out and touch grass and try again.