Replace values in matrix/table based on reference table

Just copy the next code and past it into advance editor.

Summery:
Step 1: Unpviot table 1

Step 2: Merge the Table 2 and result of unpviot table 1

Step 3: remove extra column

Step 4: Pivot the result table

let

     Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WcixKTVRwVNJRMgRiIyA2VorVgQo7AbmmQGwGxOYIYWcg1wKILUG6DJRiYwE=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Area = _t, #"round 1" = _t, #"round 2" = _t, #"round 3" = _t]),
    #"Unpivoted Other Columns" = Table.UnpivotOtherColumns(Source, {"Area"}, "Attribute", "Value"),
    Source2= Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WcixKTVRwVNJRMgJiQ3OlWB2omBOQbwoSN0QVMwepM0GIOQP5lkBsbKYUGwsA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Area = _t, Cluster = _t, Count = _t]),
    #"Merged Queries" = Table.NestedJoin(Source2, {"Area", "Cluster"}, #"Unpivoted Other Columns", {"Area", "Value"}, "New", JoinKind.LeftOuter),
    #"Expanded New" = Table.ExpandTableColumn(#"Merged Queries", "New", {"Attribute", "Value"}, {"Attribute", "Value"}),
    #"Removed Columns" = Table.RemoveColumns(#"Expanded New",{"Cluster", "Value"}),
    #"Sorted Rows" = Table.Sort(#"Removed Columns",{{"Attribute", Order.Ascending}}),
    #"Pivoted Column" = Table.Pivot(#"Sorted Rows", List.Distinct(#"Sorted Rows"[Attribute]), "Attribute", "Count")
in
    #"Pivoted Column"

result

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