Interesting. Those are the things that actually stayed the same when switching between modes. When you first released the mod, I started out on Basic to get a good feel of it since I had some other of the recent survival mods as well at the same time. I recently switched to MC mode and I like it a lot, but I switched back to see how things worked. Running back on MC now, though. Anyways, you're constantly making this mod better. Even if 1 loaf of bread weighs 1 lb.

{edit} okay, the bread part seriously needs to change, lol. Please please please. Dough is heavy. Fluffy loaves are light. I'll forgive the potato's weight of .8

Looks like just protein, nutrients, and the fatigues get reset when you switch from complex to basic, switching from basic to complex resets protein, nutrients, and morale. The numberless vitality menu looks at those numbers when deciding which penalties to display, so they need to be reset to zero or you'll see complex penalties in basic mode (means I need to reset morale too when you switch from complex to basic.)
The food weights are all pretty reasonable - a large potato really does weigh close to a pound, and the bread loaves are great big loaves of sourdough. They're both quite a meal. The ones I think are maybe unreasonable are the wines and water, half the weight comes from the glass bottle.
Anyone using IMCN along with Real Wildlife?
when I activate both, I always CTD when I barter with Hulda in The Bannered Mare, Whiterun.
If I only use 1, either IMCN or Real Wildlife, I got no CTD.
Anyone had a similar problem?
I'm using a lot of other mods as well though, so you might need a combination of Mod A,B,C,n to replicate this.
Can you confirm that its just Hulda, or do any other merchants do the same thing? As far as I know I don't treat Hulda any differently from all the other merchants. This mod temporarily adds several merchant containers to a quest reference alias with items in its inventory to add those items to the containers. That happens once a day, and the aliases are cleared immediately afterwards.