Several of the cmdlets in the scripts can indeed be run with the RunAsync parameter.
But be aware that in this case you will have to coordinate the flow of the script yourself.
For example, when you run the Update-Tools with the RunAsync parameter, you will have to build in a loop to wait till the update of the VMware Tools is finished (similar to what you did with the Set-NetworkAdapter cmdlet) before continuing with the next lines in the script.
The advantage is of course that you can run x-number of VMware Tools updates in parallel.
In summary, it will be faster but the script will be more complex.
