Hey...I can show you it working on my own sites so I know for sure that there isn't a problem.
I'd uninstall the integration mod, then upgrade the arcade then reinstall the integration mod...and I'll lay odds with you that you'll wonder what all the fuss was about when you're done as it will work without even a murmer of discontent.
The integration mod doesn't have any version checking in it so it will try to work with any SMF Arcade version...and will probably work with most (if not all) of the 2.x series. The changes from 2.07 to 2.08 don't affect anything it uses so, again, there simply isn't a problem.
I wonder if they tried it or just assumed there would be a problem? Maybe Rider had a modified version and that caused difficulties.