Macedon or Seleucids adopt the manipular system

[walmart]

Could Macedon or Seleucids adopt the Roman manipular system after
Second Macedonian war or Seleucid War

How would this impact the Roman conquests of Greece and the Middle East

 

[TheHittite2002]

See Nicholas Sekunda: "Hellenistic Infantry Reform in the 160's BC" where he argues that the Seleucids and Ptolemies did adopt the Roman system.

 

[Flavius Iulius Nepos]

Could Macedon or Seleucids adopt the Roman manipular system after
Second Macedonian war or Seleucid War

How would this impact the Roman conquests of Greece and the Middle East

It would be interesting to see the Seleucids fighting against the Parthians with the manipular system. Any chance to slow down their decline in the east if they adopt such fighting style after Magnesia? Or would it be even worse?