Co-sleeping - I use blankets, but angle them so they stay under DD3's armpits. We switch sides nursing at night, so DD3 sleeps on whatever side she fell asleep nursing last, sometimes on the side, sometimes in the middle of me and DH. When DD2 crawls in with us at night she sleeps on the other side of DH. It's a super low king sized bed from ikea that I think is perfect for this stage. I leak PLENTY, day and night, but I still sleep topless. We have a wool blanket under me and DD3 and I keep a regular sized prefold over my chest. I leak most when she's nursing, so I'm careful to keep it on the other side when I'm nursing. This is pretty much what I did with the older two girls too, so I didn't think too much about it this time.
Swaddling - DD1 HATED being swaddled. It made her scream and cry and kick and squirm and ... I learned that quickly. I haven't really tried it with subsequent babies. DD3 sleeps in a thin cotton sleeper, but I live in the Houston area, and we keep our house pretty warm, so I'm not dealing with cold winter temps like many of you.
Bottles and pumping - I've never pumped and none of my kids have had bottles I didn't set out to do it that way, but with DD1 it was always easier to just bring her with me when she was smaller, and as she got to be 12+ months, leaving her with DH for an hour or so wasn't an issue. I donated my pump via holiday helpers on MDC when she was 2. I've never acquired a new one, or wished I had one. By the time I'm ready to be away from baby, baby is ready to go long enough without nursing to be away from me. I have the luxury of being a SAHM, and it's just what's worked for me.
Miranda - I'd be upset too, about many of the in-law issues you've mentioned. I can't handle much time with my in laws staying here, and not at all without DH home too.
Slings - I love pouches with newborns. DD3 rides in a pouch sling for many hours a day. It's so different with baby #3. Life just moves on, with a new tiny one in tow.
Cloth diapers - We use cloth from birth. So far DD3 wears KL0's (the old ones from before they added microfiber. I HATE microfiber.) with either wool or PUL covers. We used KL0s and wool for DD2 when she was tiny, and prefolds and PUL for DD1 when she was a baby. I love our diapers.
AFM - Vella's 2w2d old now. DH went back to work Monday, and the 3 girls and I had a surprisingly good day. Then that night DD2 came in crying and coughing with a classic seal bark sounding croup cough. None of my kids had ever had that before, and I was terrified for DD3. DH stayed home tuesday and took care of DD2 (who mostly slept against him on the couch while he worked at home), and took her to the ped late in the day. Turns out she has her first ever ear infection! She's on antibiotics, another rarity for us, and I'm way less worried about contagion.
DD2 has been acting out plenty, getting into lots of mischief, throwing fits, screaming at the top of her lungs, etc. I don't know how much of it is about the transition to being a big sister, DH going back to work, being sick, or just being 3. I'm trying to be super understanding, but it's exhausting. She is beyond sweet and adorable with her new baby sister though.
My bleeding has been super light and practically nonexistent for the second week. Then Tuesday night I overflowed a pad (cloth, and not a big one, but I'd been waking up with clean pads for quite awhile) and I was pretty worried about it. I intended to call or text my midwife later that day, but it was a full day, and it seems to have been a fluke. I've been barely bleeding at all since then
Today, after DD1 and DD2's gymnastic classes I was nursing DD3 in arms while holding a diaper bag and a couple of lose things. I walked quickly to DD2, who was a ways from me and near the parking lot, and bent down to talk to her and let her "touch tiny baby Vella". Another mom I don't know at all laughed and said "That's quite an evolution from the first when you feel like you need to sit and have your water and ..." Made me smile. Such a positive and casual reaction to seeing me NIP. In my nearly 5 years of NIP, I've yet to get any negative reactions