Everything there looks normal. Now you have also more free memory (ca. 305MB) compared to your previous posting.

There also exists app called n9-button monitor, which lets you to use long press of volume keys to light the flash LED when the phone is idle. I haven't used that shaketorch app yet and I don't really know if polling accelometer is more resource intensive (just have a gut feeling it might be), but maybe someone with more knowledge can comment on that.

Other than that your N9 is probably as fast as it can be without overclocking. Even if this device is quite tweakable the hardware has its limits.

Also if swapping becomes a problem, then reducing systems tendency to swap *might help a little. I expect that you won't even notice the difference, but if you wish to try you can write some smaller value to /proc/sys/vm/swappiness (default if I recall correct is 25). Smaller value means that kernel will be more conservative in moving pages to swap. Values can range from 0 to 100.

Example:
Setting swappiness like above is not permanent and is in effect only until next reboot (then sysctl sets it to default value, which is defined in /etc/default/sysctl). As to what value works best for N9, no idea. I use 10 right now.