remember (name) will only show their intro at the time that you remembered them, and there's no way to update it sans deleting the remember (and losing any notes you had on them) and re-remembering them. Even trying rename keeps the former intro. There should be a way to refresh the intro you remember when they're currently in the room.
Secondly, it can be difficult to know which target you're targetting, such as in the case of livestock.
look 5.horse does not indicate which color horse you're looking at. I think the current intro should precede the long description when you look at a PC/NPC.
look 5.common This is a common horse, bred as a mount. She is taller than Taunya by several feet!could be:
look 5.common She is a common, palomino horse. This is a common horse, bred as a mount. She is taller than Taunya by several feet!Likewise for PCs.
look McDude He is a tall, dark Farin man with a missing left eye. This tall man has a totally awesome description which I am too lazy to write, and appears he could eat Norrigs for breakfast. He is taller than Taunya by several yards!Naturally, the intro should be replaced with the cloak/mask intro when they are concealed/masked, becoming "They are".