I think you could take the building of bayis sheini as an example.
When it was built, it was a time to rejoice. However, there were those who cried. (I can just imagine the headlines…) They cried because they remembered how much more beautiful bayis rishon was. That doesn’t mean they were unhappy about the rebuilding.
Everyone agrees that the current rebuilding is a good thing and something to be thankful and pleased about.
But if you think about what it really should be like (shechina, bayis shlishi, etc) then you don’t see a reason for celebrations. Though, again, you may be thankful about it