If you fate grind 2 hours a day and call it a full days work then you deserve to be disappointed. I did a full ATMA grind in around 30 hours of play time. Not that big of a deal. I've done ATMA twice. Maybe 37-40 hours the first time. Animus grind was a bigger pain in the ass than ATMA grind. Nothing needs to be changed. You can get better weapons if you want them without grinding.