Yes I would also like to know if the update is mandatory or not. I have some wallets to manage, I update them every now and then
I always wait at least 2 weeks after release. Usually in this time the most problems, if there any, are solved and you have no stress.
If you ask me, I think that two weeks is too little. Bitcore is not as widely used as its "progenitor", the Bitcoin. For example, I never update my browser to the next major version unless it gets a minor update, typically soon thereafter. And with wallets, it may be a good idea not to update at all unless some critical security issues are fixed in the newer version or some important features are added which you can't live without.
Better safe than sorry.
Can't say I like the looks of the new wallet, too bloody pink... Burns a hole in my retina
This is not pink! Well, actually it is but some dudes here definitely don't agree with that. Another reason to stay with the old wallet, though.