May be that a Scouse accent is now dictated by the North End Screech a la Carragher rather than the more educated tones associated with the South End.
Yep, there's that as well.
On a related note, like most cities of a certain size, Liverpool doesn't have one 'typical' accent I would say.
It almost detracts from the heritage and culture of a city to claim that only one accent exists, and all others are not authentic or whatever.
It's noteworthy that the older generations do tend to have slightly different accents to the younger generations (and we're not talking about dialect here, either), so there's really no wrong or right answer. It's just evolution and development due to migration, multiculturalism, socio-politics etc.