I like the ideas about new puzzles and tech point/food levels, the huts going from stick to stone, etc. I think those are wonderful Ideas.
Personally, I would like to see new clothes cost a lot less, since you or me, cannot afford them when we are trying to get the tech levels for upgrades, so it isn't until after everything is done that we can afford them.
I love the VV games. The reason I love them is because they are not too difficult to do. I like the simpleness of them. If they become to technical or upgraded too much, they will become like all the other games that are out there, and that might even raise the cost of the game. I like the idea of trading with other islands,other tribes too.
I liked V1, but I could shut down and come back later and not have missed anything. Kids were born without my help, villagers worked where they were supposed to, and went on the the next whenever they were done. No challenge to that game. V2 I love because I can sit there and help get the tech points up, I can grab a villager who doesn't want to work and put him back, I can decide who sleeps with who, etc. More interaction without becoming too technical or overwhelming. I actually pause V2 until I can come back to it. I didn't with V1. I play V2 over and over again. I don't play V1. I played it twice and then dropped it.

Just my two cents.
And anyone who has problems with hygiene needs to get a life. This is virtual reality people, no germs unless they are programmed in.