Describing your trip report as amazing would be an understatement. I have never read so much specifics with tons and tons of helpful information. You are rivaling DrRich for poster of the year! We were there in January so I'll just give a few thoughts on your comments.
1. We were on the Calipso and the crew, boat and food were the opposite of your experience. Crew did everything or nothing for you based on what you wanted. Keeping your wetsuit on between dives is nuts in that weather. We had 4 hot showers on the back of the boat...always hot...and the crew would help you either get there in your wetsuit or get your wetsuit off and get you there for a warm up then wrap a HOT towel around you and offer you hot chocolate. We always laughed because they would even bend down and help you take your boats and socks off...if you wanted them to. First dive was at 6:30 am after very light snack. All in all, everyone of our group (16...we had the whole boat), loved the boat and the crew.
2. Wolf and Darwin were a bit hazy so we saw schools of hammerheads as shadows. We did get lots of closer encounters in small, 1 to 4 groupings. For the marine iguanas, spouse and I wore a 7 mm, 3 mm hooded vest, two lavacores (one long sleeve and one short), a beanie over the hood on the vest and another 2mm hood over the beanie. Water temp was 59 F and we were lightly shaking after 35 minutes. On the Mola Mola dive we only saw one in the haze. Temp was surprisingly warmer than we expected...68 degrees.
3. Had the same conversation with my wife when we got home...If the water temp isn't over 80 F, I'm not going. We've been blessed with being able to travel for diving since the kids left for college. We're now in our late 60s and we can't handle cold, even topside...though we live in the Chicago area...go figure.
4. A couple in our group stayed for an additional week and did the naturalist tour on the Calipso. Same itinerary (alternating hiking and snorkeling) light snack, then hike, breakfast then snorkel, lunch then either hike or snorkel then reverse after afternoon snack. They loved the 7 day naturalist trip.
5. Since we spent 5 nights in Quito, our trip had some variety and we really loved Quito and the hotel we stayed at. All in all, we're glad we went but agree with you that maybe price to enjoyment ratio was out of whack a bit. Others on the trip were more "over the moon" because they handled the cold a bit better.
Thanks so much for your post. Those with an interest in the Galapagos will benefit greatly from the time you took to write it.
Rob