I was having trouble with a lot of the A rank missions on ltw because I was being stubborn and not using food on the first day. After I started using food and the cp tisane I found that most of them weren't bad, though there were still a couple that took a lot of attempts to gold. I like that the content gives you the materials for the crafts, it made it so I didn't feel bad experimenting with my rotation until I found something that worked. I honestly had fun trying different things, and even making use of specialist actions for the first time in awhile.
Silvers are still worth a lot of points towards the relic, so I encourage players who are struggling to keep trying and experimenting. There is a fairly wide gap in difficulty among the A rank missions so you may find some you can do even if not all of them.
Haven't tried much gathering yet so I can't comment on them.
Edit: I realize I kind of talked around the point, but overall I think it's ok for the content to have some harder recipes mixed in since all rewards can still be earned by players with easier missions, the red alerts, ect. Admittedly I don't know how much slower it is if you avoid A ranks altogether.