I do think there should be a ton more blocks in the shop and that all resources should be buyable in the shop.
I think things like item frames should be sold by its ingrediants, leather and wood, instead of by itself.
Some things like book and quill can not be added because there are tons of exploits that can be abused.
Beacons, enchant tables, and elytras have very little use so I dont see the reason to raise the price.
I hope that next season, if they intend to keep the same farming style of gameplay, that they do add beetroot and other items from newer versions.
Redstone lamp is in the redstone section, at least on atlas.