It all depends on who the extra/new HB or FB is going to be.
If we sign Williams, we could have one of French, Field or Zak at FB. If we miss out on him and move Field to 6 then we could have French at 1, or we could even sign a guy like Dufty to play there. French might go, or he might stay etc.
1- French
6 - Field
7 - Smith
1- French
6 - Williams
7 - Smith
1- Dufty
6 - Field
7 - Smith
1- Field
6 - Williams
7 - Smith
It's too soon to say "this back line" is better than that one etc. At this time, there's too many moving parts. I will say however that the other guys might not be "stars", but guys like Zak, Bibby and Thornley are good enough. They won't ever be embarrassed and I've seen them all outplay so called better players. Johnstone being a perfect example, Bibby has had him in his back pocket a couple of times.