I'd strongly agree with you. I'd 'much' rather experience that Grinch scene than the absolutely terrible F&F. Ironically, the F&F is such bad unintentional camp comedy, it's even funnier than Carey's Grinch.
Everyone involved in the planning and production of the F&F attraction should be ashamed of their work. In fact, one of the creators Thierry Coup , even publicly said as much. That was an example of why film and theme park attraction synergy decisions aren't always wise.