There is bound to be ongoing issues following the upgrade. The Admins are constantly making changes to utilize features that members are asking for, so while making those changes "without taking down the forum" you will often find stalling & possibly freezes as the system starves for resources during a modification.
I'm sure when everything major needing to be done is complete that the Admins will definitely be making an announcement to the members (they like to brag).
It's the price we have to pay instead of suffering withdrawal by not being able to connect to the site at all.
VapeOn,
Greg