According to this article, the movement of Bank of America’s European banking and markets operations are complete, and the new European base will be located in Dublin. This move came as it was announced after the regulatory and legal issues were taken care of. Think that it was wise not to wait anymore, as the Brexit scenario is nowhere near completion and this status is already affecting many companies and businesses.
https://www.siliconrepublic.com/companies/bank-of-america-dublin-brexit