There's an unfortunate bug with this new rewrite of the dynarec core, it seems that game logic can now run slower than the framerate - there are 2 games where this is particularly disastrous:
Rival Schools now runs full speed but the in game speed slows down dramatically, no matter what you do
Ghoul Panic slows down to single frame speeds even though it's still running at 60fps
I suspect that other games also have incorrectly emulated speeds such as Gran Turismo 2 which leads to an overall slower gameplay experience, which is really unfortunate as WiiSX 3.0 is a HUGE update that basically marks the majority of PSX games as fully playable on Wii, games like Chrono Cross, Final Fantasy 7 and Vagrant Story run at full speed with no frameskip which is truly incredible to see on the original Wii. It's barely worth even making a compatibility list anymore since almost all games can now be assumed as working and full speed so it's only worth pointing out which games don't actually run, so here's my following list of games that don't run in any capacity or have truly game breaking speed issues:
3D Fighter Maker: Code dump upon trying to load a game
NHL Open Ice 2-on-2 Challenge: Crashes after loading, unknown if it worked fine on older WiiSX build
Roll Away: Now crashes after the first level, used to work perfectly fine on older builds of WiiSX
Rival Schools: Speed issues, runs slower than it should despite keeping a full 60 FPS
Judge Dredd: NTSC version has a severe freeze that renders it unplayable, PAL version plays but will encounter severe freezing when dying and starting over again but eventually recovers
Ghoul Panic: Truly severe speed issue dipping down into the single frames and basically rendering the game unplayable despite being able to keep a full emulated 60 FPS
Jet Moto 2: Code dump upon trying to load a level
Thunder Force V: First boss can crash the emulator can kick you back to HBC
For those of you who haven't already, I highly recommend checking it out:
https://github.com/emukidid/pcsxgc/releases