Yo, Darcy! To answer your questions:
1. I don't personally miss fruit, but I think I'm atypical because I've always been more of a vegetable fan. There are a few foods I miss, but the longer I stay in ketosis (currently on day 75), the less I'm interested in any food. At this point, I'm eating to live, instead of living to eat. It's an interesting change, but I know a lot of people might see it as a negative.
2. There's actually a discussion on fruit over on Oro's journal, a few pages past where I originally directed you. You can read it
here. The short answer is: if non-berry fruit is important, then you can find a way to consume non-berry fruit, and still be 'in ketosis'. The caveat is, you have to pay attention to what you're doing.
3. Fuck all food pyramids! They're all influenced by politics, and personal opinion. Figure out what works for you, and stick to it. There seems to be a growing societal gestalt that insinuates the idea that eating 'just right' will prevent people from declining into old age and ill health. Except 'just right' keeps changing, and the camps are hotly contended. Plus, you know, everyone has to die of something. Eating well is certainly better for longevity, but it's not the guarantee of vigorous old age it's being sold as. (This isn't a question, just me being pedantic and proselytizing).
4. Whole 30 vs Keto. The main difference between the 2 seems to be mostly philosophy - The Whole30 philosophy doesn't seem to endorse ketosis, while keto is, by nature, all about inducing and maintaining nutritional ketosis. Whole30 includes several carb dense roots veggies and squashes that will keep glycogen stores topped up, thereby preventing anyone from (or stopping anyone currently) burning mostly ketones. Many people who do Whole30 seem to end up in ketosis, but they aren't necessarily aiming for it.
4.cont. I tried Whole30, and it was fine from a bodily comfort standpoint, but I really chaffed at the idea that Whole30 was in charge of what I chose to eat. The gal from I Breath, I'm Hungry summed up the mental aspect much better than I can, so
here is linky. I'm not criticizing the approach, and I know a lot of people love the framework. I just know that it drives me absolutely bugfuck within a few days.
Hope that helps.