I would argue yes and no (for the split). They created two separate legal structures under Barclays PLC, since they had to (https://home.barclays/who-we-are/ring-fencing-explained/) but as a consumer would you notice? The branding remains the same and the consumer probably doesn't notice when interacting with Barclays.

Can't comment on the investment bank situation, but I know they went through a few CEOs a few years back :)