I'm not putting words in your mouth, I was just saying that once you head down the path of baking rotational abilities into each other then eventually you end up without anything to press.
My understanding of bloat wasn't 'Vampiric touch, because we have SW: P'; rather, abilties that we have keybound but rarely if ever use. Mind Soothe was a good example of one that was previously cut. It wasn't an ability you could spell book when you needed it, but you needed it so rarely. Mind Vision is an example of something you use rarely but CAN spell book, there's little to no reason to need it keybound. Following that same logic I don't see many other spells left in the priests spell book that get used as rarely as mind soothe was, but needs to be keybound. Innerfire/Innerwill and Fearward maybe straddle the line - I guess you could spell book them since it's rare you need to cast these during combat.
The only other thing I can think of is limiting the cross over spells between specs, which would involve removing things like flash heal from shadow and SW: P from holy, etc.
Or potential redesigns of spells rarely used by certain specs. Hymn of Hope for example could be 'each time mind blast deals damage, 100 mana is distributed between the 3 lowest mana nearby party or raid members'. Or whatever else to keep the utility but remove the button.
I just think it'd be a tough argument to make to say that vampiric touch and / or SW: P are 'bloat'. They are staple components to shadow priest gameplay and the last thing shadow needs is to be simplified.
EDIT; after browsing my spell book. Psychic Horror could go. I havn't pressed it once this xpac, although I don't pvp. Either cut it or remove the orb cost.
Psychic Scream would be on my list if forced to cut some, although I think this will be determined more on their overall CC redesign rather than trying to reduce bloat.
Shackle Undead same issue as Psychic Scream