What has changed for NI since Nations League?

With some new faces, players on the move and strikers finding form, it has been an eventful four months for Michael O'Neill's squad since their Nations League promotion in November.

What has changed for NI since Nations League?
With some new faces, players on the move and strikers finding form, it has been an eventful four months for Michael O'Neill's squad since their Nations League promotion in November.