Script to Routinely Update Members of an AD Group

We have a Group that is made up of managers (those with direct reports) and want to run a PS script routinely to add and remove members of the group. I would think emptying and repopulating the group members would be the most efficient, but also wanted to see the changes as a sanity check.

Here is what I came up with, but was wondering if there is a more efficient or elegant way to accomplish this.

if (-not (Get-Module ActiveDirectory)){           
  Import-Module ActiveDirectory           
} 

$ExistingDirectReportMembers = Get-ADGroupMember -Identity 'users with direct reports'
        | Get-ADUser -Properties SamAccountName | Sort-Object SamAccountName
$NewUserWithDirectReports = Get-ADUser -Filter {( directReports -like "*")
        -and (enabled -eq $true)} -Properties SamAccountName
        | Sort-Object SamAccountName

$UsersToAdd = Compare-Object  –referenceobject $ExistingDirectReportMembers 
        –differenceobject $NewUserWithDirectReports -Property SamAccountName 
       | where{$_.SideIndicator -eq "<="}
$UsersToRemove = Compare-Object  –referenceobject $ExistingDirectReportMembers 
        –differenceobject $NewUserWithDirectReports -Property SamAccountName 
       | where{$_.SideIndicator -eq "=>"}

Write-Host "`nUser count BEFORE Update:" $ExistingDirectReportMembers.Count

"`nUsers removed:"
ForEach ($user in $UsersToRemove)
{
    Write-Host $user.SamAccountName
    Get-ADUser -Identity $user.SamAccountName
          | Remove-ADGroupMember -Identity 'srs users with direct reports'
}

"`nUsers added:"
foreach ($user in $UsersToAdd)
{
    Write-Host $user.SamAccountName
    Get-ADUser -Identity $user.SamAccountName
          | Add-ADGroupMember -Identity 'srs users with direct reports'
}

$FinalDirectReportMemberCount = Get-ADGroupMember
         -Identity 'users with direct reports' | Select-Object SamAccountName
Write-Host "`nUser count AFTER Update:"  $FinalDirectReportMemberCount.Count