I would like to address some prolematic trades.

2 Note blocks = 12 emeralds

2 note blocks costs 16 planks (4 of any logs) and 2 redstone.
One of the most abused fletcher trades is 32 sticks (also 4 logs) to one emerald.
and i don't believe that two redstone are valued at 11 emeralds, lol.

after repeated trading with the bard, it's easy to reduce the price of 12 emeralds to 1 note block, which causes duping issues with the 8 emerald = 1 note block trade. This also causes duping issues after a cure.

Etching table = 22 emerald and 26 emerald = in etching table causes duping issues after 1 cure.

28 emerald = 2 blank discs makes exploring the world + setting up farms for discs useless. Remove this trade imo.

So does jukeboxes + album jukeboxes + etching table trades. You would usually only need one of each of them, so the trades just takes up space.

Some suggested trades:

1. Dyes for emeralds
   Pretty big indicator that you can dye the discs. It took me a while personally to figure that one out.
2. Diamond for emeralds
   Since jukeboxes and etching tables all need diamonds in the recipe /shrug
3. Emeralds for bells
   Since bard houses spawn with bells
4. Some blocks that would affect note block instruments for emeralds
   Like Quartz, Hay bale, wool, clay, and concrete powder. Could be away to hint towards note block pitches. Would also be cool if all bard houses's note blocks generated with a random block that would alter the instrument under it. Also, would be cool if we had blast proof plates and targets for S&R compat.