Often in VMWare I launch severam VM's quickly in succession, and often am blocked when a modal pop up occurs... Some thought should be given to making pop-ups specific to a VM, and not blocking or obscuring anything when I am viewing a different VM. Make the specifiv VM's tab flash or something to get my attention, don't throw up a dialog box and wrench keyboard focus away from my current work.
Also, why on earth does shrinking/cloning etc. block me out of the entire Workstation interface? It shlould block out/grey out affected machines, and let me continue working with other running VM's.