I recently upgraded from 10.6 to 10.10 and find Mission Control a total disaster and a step back when accustomed to work with 4+ desktops. E.g., it is impossible to (i) view all desktops in a matrix form (small rows only), (ii) to view all windows on all desktops at once (only possible to view all windows on one desktop at once) and (iii) to migrate one window from any desktop to another one freely. Are there any *free* apps out there that emulate the Expose and Spaces from 10.6 ? Apple *should* give the option for users to revert to Expose - especially considering the terrible downgrade Mission Control (aka Mission Impossible) is.