The AEO status had no real significance in Switzerland in recent years. There were no advantages when dealing with the customs administration.
Also in future, AEO will not be a mandatory requirement in Switzerland. However, it will become more important because a company that has AEO status automatically fulfils basic conditions that are necessary for the approval of customs facilitation.
Therefore, it could be of interest for Swiss companies to have AEO status. You can find more on this topic on the website of the Federal Customs Administration (only available in German, French and Italian).