Blue
Ravenous Bugblatter Beast of Traal
I don't think most people find adding 5+4+3+4+2+1+1+2 to be any more difficult than counting to 8.
After getting used to the points costs associated with spells most people will also find their favorite spells preparation point costs ingrained in their memory.
Oh, I want this spell and it's 4 but I only have three left. Didn't that one have a not-quite-as-useful but a point cheaper spell that'll fit my same need? *sigh* Let me browse the lists again.
Doing the math isn't the only fiddly bit.
That said, I don't mind fiddly as long as players are prepping off-table. I can easily come up with several variant spell lists and say "I'm preparing my urban adventuring list today".