My experience so far in r63/64 (since r64 is way to update meta.xml file)
All of this was done under USB side and only GCN controller on the 0x11 Hollywood Wii (IOS version, not boot2 for anyone that uses BootMii)
-Sonic Gems Collection is broken after choosing what screen scan (worked before on a previous revision, but will not load any of the game selection like Sonic R, Sonic CD and so on)
-Super Mario Sunshine black screens after loader booted (worked on previous revision also able to save but can not leave the hub area)
-Super Smash Bros. Melee works again as normal, but still can't use any created save data
-Terminator 3 Redemption freezes any intro part if you don't quickly press any button to pass them, but still crashes when u reach the main menu
-Need For Speed Most Wanted black screens after loader booted (I believe it did work on a previous revision)
-NBA Street V3 freezes at the beginning of the loading screen and then shuts of Wii (I can't recall if this work on previous revision)
-Mario Kart Double Dash is still able to play as normal. Some saving from either gameplay or ghost saves will crash the game. My gamedata for gameplay is too great for me to see if I'm able to beat my old records.

But saving ghost I can do but some ghost saves will break. r61 was able to save Luigi Circuit, but somewhat on Baby park (endless save loop), but now r63/64 just freezes on saving ghosts.
My sis and I have a few more GCN games, but I do know I can't reach those because she has her's stored away and the only way to reach those games is by finding them only (store or download).
I do remember that my sis has 3 games that I liked. one of them is on that list (Sunshine), but I have to do the download way to play that. ;(
The other 2 are Mario Party 5 and Monopoly (don't ask why I like that game XD).
Anyway. I'll may look back on previous revisions that I have stored on my SD card to see which ones where able to play on that revision).
I wish I can use both USB and HID at the same time on my Wii, but The top port on the wii is broken (This Wii was given to me after a friend of my tried to fix my old Wii from its ever long sleep of Banner Brick)
Is there any chance in later revisions that Nintendont can run with a USB Multi-port devices? Just wondering that's all. I know that Full MC Emulation is first and so on is compatibility. It would be nice added feature to some people that likes to use a mult-port, just in case people have broken USB ports and such.