I agree ,they yellow leaves if they appear to be limp and dying from pictures, i would remove them.
my opinion is you can go either way with removing the big leaves as a general practice.
My thinking is the big leaves have a specific use for the natural growth and survival of the plant, in general. But we are technically "tweaking" nature's process for the -purpose of increasing the yield of bud.
In nature the bud(thc) is used as a defense mechanism to prevent the plant from being eaten.
In nature the plants leaves fall off, buds are eaten or fall off for the reproduction of new plants, plants get injured and need to recover,etc. The big leaves also provide shade and help produce food. So I think the big leaves need to stay on ,in nature, to support survival of plant. Now IN our little secret (What we do is secret,The Germs) rooms we are looking for maxuim, quality buds. And we can eliminate many of risks that a plant faces in nature. SO I think we can remove the leaves. In general practice, do not remove more than 20% of leaves at one time. You want to minimize possibility of shock