I think there's too much confusion around that whole Specialists topic, probably because it wasn't communicated from EA really well. I think we are not really moving into that overwatch direction as big as some players fear. But we'll see once the gameplay trailer is revealed this sunday.
I advise you to check out this twitter thread by Tom Henderson, he talks a little bit about the new system:
https://twitter.com/Tom_Henderson/status/1402705557669167106