I feel your pain, I can sympathise, I kept my zx6 for nearly two years, to wean myself off slowly. Now the Glee makes perfect sense, the zx6 has gone. I don't regret selling it, although I do miss it, only because the option has gone, nothing to do with the Glee, which is perfect. I bought it to slow me down, to give me enjoyment at lower speeds, it succeeded, and is still performing those duties. Power was never really that important to me, it's all about the delivery, and the Glee delivers it in such a usable way I still grin like an idiot whilst riding it.
Stick with it, change your mindset. Ride some lanes, back roads, local ones you ignored when you owned the GSXR, the bike makes more sense in that environment.