I upgraded my 7+ yesterday to 11.2 and the difference in speed compared to 11.1.2 is noticeable. Switching apps, 3D Touch actions, Home screen are all much faster than 11.1.2. Battery seems to be better too (need a few days to verify).
I know plenty of people have had issues with 11.x but for me I haven't had many issues, even in the Betas.
I know plenty of people have had issues with 11.x but for me I haven't had many issues, even in the Betas.