Its possible that the reason for the name change is to distance itself from a franchise that has grown stale to the public.
Still existing in the Alien universe, including the alien now, pehaps a version that used the Jocky for a host, bigger monster, not 100% what we saw in the past, to make it new, an alien xenomorph none the less.
But simply leaving the name "Alien" out of the title.
It could still breath new life into the series.