Comment 12 for bug 706458

Let me suggest a simple solution:

Why not display a quicklist along with "facilitating a switch to
one of its windows".The quick list may include:

'Minimise this group/Minimise'
'Close this group/Close'
'Open all in this group/Open'

options depending upon whether one or more windows are open.
That way minimising and switching are both facilitated.
Obviously, quicklists - a part of the launcher come into play nicely.