Awesome, the spoiler fix is working, including on old (pre-migration) spoilers. That was perhaps the top remaining formatting issue for me.
Remaining ones I can think of off the top of my head:
- Per-post titles haven't returned. I don't know if XenForo supports these at all or not, but have not yet added bold intro lines to my old posts to replace them in the hope they may return.
- The aforementioned missing smilies, such as

and others that have been mentioned, as well as some such as the Christmas tree that have not.
- Some special characters are still shown as codes; for example I have what I believe was a dagger (†) in one post, which is now †. I don't know how feasible that would be to fix since there could be any number of special characters stuck in limbo, but it would be nice if it's not excessively difficult.
My other most-missed feature is the collapseable forums on the main page; it does increase the amount of scrolling noticeably. Although I should probably try subscribing to entire forums and seeing if that view (after I've subscribed to the ones I used to have non-collapsed) is a sufficient substitute.
Edit: Okay, that actually works fairly nicely. For the top-tier forums ones, it might actually be better - I can pick and choose from the Civ III forums, for example, and not include ones that are inactive/I don't follow.
Would it be useful to have a post documenting all the various issues/requests, so they don't get lost, and it's easy for people to find the status of their pet issues (to do undetermined time, in progress, unlikely/won't do, etc.)? I suspect there's at least a few in this thread that, while not showstoppers, might be easy fixes, and it would be a shame to miss out on low-hanging fruit due to poor visibility.