Courgane has probably nailed it to the main problem. Yes a lot of us want a new and better sl. Yes, anything that improves the experience is great.
However, the problem is what about inventories, characters, equipments, etc... Some people have spent a lot of money, and time and effort in their characters. Yes it is true that all this was a lease, that it could end at any time, and this is a better option than LL going bankrupt and SL closing with no alternative.
However, the transition might be a time of chaos and trial, while all of us adjust to the new system. And the new rules, the new meter, and while clothes, textures and skins are created. Our avatars as they are today, were not created overnight. Some are an evolution of years, trial and error, opinions and help from friends, etc... On day one of SL 2.0 we will all be noobs, and look like (and I am sure Anarch will love this) horrible prim haired noobs.
But all in all, I think we will all survive and be fine