переформатирование печатной строки в определенный формат

Это сделает то, что вы хотите.

Option Explicit

Const ANALYSIS_ROW As String = "C"
Const DATA_START_ROW As Long = 1

Sub ReplicateData()
    Dim iRow As Long
    Dim lastrow As Long
    Dim ws As Worksheet
    Dim iSplit() As String
    Dim iIndex As Long
    Dim iSize As Long

    'Application.ScreenUpdating = False
    Application.Calculation = xlCalculationManual

    With ThisWorkbook
        .Worksheets("Sheet1").Copy After:=.Worksheets("Sheet1")
        Set ws = ActiveSheet
    End With

    With ws
        lastrow = .Cells(.Rows.Count, ANALYSIS_ROW).End(xlUp).Row
    End With


    For iRow = lastrow To DATA_START_ROW Step -1
        iSplit = Split(ws.Cells(iRow, ANALYSIS_ROW).Value2, ",")
        iSize = UBound(iSplit) - LBound(iSplit) + 1
        If iSize = 1 Then GoTo Continue

        ws.Rows(iRow).Copy
        ws.Rows(iRow).Resize(iSize - 1).Insert
        For iIndex = LBound(iSplit) To UBound(iSplit)
            ws.Cells(iRow, ANALYSIS_ROW).Offset(iIndex).Value2 = iSplit(iIndex)
        Next iIndex
Continue:
    Next iRow

    Application.CutCopyMode = False
    Application.Calculation = xlCalculationAutomatic
    'Application.ScreenUpdating = True
End Sub