The takeover took a long time - over two years. Some of the Wachovia Financial Advisors became Wells Fargo Advisors. Many left or were transferred.
In the retail bank, most tellers and bank managers stayed through the transition. About 6 months after the Wells Fargo takeover was official, a wave of firings and a change of personnel went through. The reason that I know this is that I was a customer through the entire takeover, and I was paying attention.