Why is there no way to pass InitialSessionState to the remote RunspacePool?

Why is there no overload in the following method that takes a RunspaceConnectionInfo (to indicate the remote server information) as well as an InitialSessionState ?

http://msdn.microsoft.com/en-us/library/system.management.automation.runspaces.runspacefactory.createrunspacepool(v=vs.85).aspx

Full context:

I am creating a RunspacePoolCache that will cache remote RunspacePools created with RunspaceFactory. The cache holds a key to information about the remote server. Prior to the RunspacePoolStateInfo.State Open pool, the same RunspacePool will be used to execute Powershell scripts on the same remote server. (Shameless plug: will this work?)

Now I want to add a set of Powershell snap-ins that are common to the generated RunspacePool. Adding snap-ins to an executable script from time to time results in the following exception:

An item with the same key has already been added

      

        
        
        
      

    

This happens even when I do the following in a Powershell script (but less often):

if ((Get-PSSnapin | ? { $_.Name -eq 'VeeamPSSnapIn' }) -eq $null) {
    Add-PsSnapin -Name VeeamPSSnapIn -ErrorAction SilentlyContinue
}

      

        
        
        
      

    

This is where I am trying to load the snap-ins via InitialSessionState . But from the set of methods provided, it seems that InitialSessionState can only be specified when creating local RunspacePools.