1. Few people actually put in effort to max out Comp/Decomp/Scroll making just to make scrolls. It's easy because of Green house. Also the Alchemy Expertise is only 250 coins, which can make things faster. Dedicate yourself by working hard and you should be able to get what you wanted instead of going around.
2. You do have to kill. Because in some specific scroll making you have to gather summon beast fighter tail and summoned beast tail which is not in the npc but you can kill them from low and high level monsters.
3. You just have to get use to which is which. No outline = LQ, Yellow outline = MQ and green outline = HQ. Fiesta was designed this way and yea, just have to get use to it.