The big drawback for me is the lack of a conventional knife blade. The blade on my Wingman is better than most pocketknives I've carried. Once I started carrying the Wingman, I didn't see the need to carry a pocketknife anymore. With the Spirit, I'd need to carry a pocketknife in addition to the multitool.
No RS, I wish. I hear ya on the knife blade, it would be nice if the spirit had OHO one hand open blade. I carry a folder " leathermans c33 " so it's never an issue. You might like the wave.
Do you have an RS? Those look intriguing.