I would love to have the task switcher in a separate pane on the pulldown bar.
- On phones like the SGS2 it takes a while to get the task switcher up (pressing and holding the home button)
- Usability-wise it seems logical to collect all "universal features" in one place
- Design-wise it should/would use the same theming as the notification/settings pane. One less UI-design (the task switcher doesn't really look like anything else in MIUI, does it..?) makes for a more consistant user experience (usability again..)