You're totally right. However, without sounding a bit delusional (lol), is there no other/easier way to do it like this? I feel like with your code it covers already 80% of the problem. 

Sub ChartToPresentation()
' Uses Early Binding to the PowerPoint Object Model
' Set a VBE reference to Microsoft PowerPoint Object Library

Dim PPApp As PowerPoint.Application
Dim PPPres As PowerPoint.Presentation
Dim PPSlide As PowerPoint.Slide

' Make sure a chart is selected
If ActiveChart Is Nothing Then
    MsgBox "Please select a chart and try again.", vbExclamation, _
        "No Chart Selected"
Else
    ' Reference existing instance of PowerPoint
    Set PPApp = GetObject(, "Powerpoint.Application")
    ' Reference active presentation
    Set PPPres = PPApp.ActivePresentation
    PPApp.ActiveWindow.ViewType = ppViewSlide
    ' Reference active slide
    Set PPSlide = PPPres.Slides _
        (PPApp.ActiveWindow.Selection.SlideRange.SlideIndex)
    
    ' Copy chart as a picture
    ActiveChart.CopyPicture Appearance:=xlScreen, Size:=xlScreen, _
        Format:=xlPicture

    ' Paste chart
    PPSlide.Shapes.Paste.Select
    
    ' Align pasted chart
    PPApp.ActiveWindow.Selection.ShapeRange.Align msoAlignCenters, True
    PPApp.ActiveWindow.Selection.ShapeRange.Align msoAlignMiddles, True

    ' Clean up
    Set PPSlide = Nothing
    Set PPPres = Nothing
    Set PPApp = Nothing
End If

End Sub
Isn't it possible to play with the following subcode? Instead of referring to the active slice in the PPT to a desired one? 

 ' Reference active slide
    Set PPSlide = PPPres.Slides _
        (PPApp.ActiveWindow.Selection.SlideRange.SlideIndex)
Yours sincerely,

Djani