4 weeks before a RWC is not, absolutely not, the time for 'development situations' solely looking onwards to say 2016 or further out.
Every spare squad slot should go now to players who may be needed for - and are credible for - actual play in RWC 2015.
I'll keep saying it, the single hardest and most critical-to-RWC-success skill to readily replace in this squad will be Pocock's. Hooper is not a back-up to Pocock. That replacement will be far harder and riskier if there's no replacement player for Poey with any 2015 Wallaby squad integration or game time prior to potentially being rushed onto a flight to London and playing with the squad for the very first time in a very long time.
Kerevi was chosen to train against the squad in prep for the possible selection of Nonu in the Blacks squad. The remainder of the players to be released in the World XV have a better chance of pushing into the 31 for the RWC.
Reasoning the ARU granted release so players can get game time before heading into pre RWC camp.
I would imagine Chieka will have a fair idea of the squad split he will take to the RWC. I would think most of the squad who played last weekend will be boarding that plane with a few selections to be determined from the form of those players in the World XV game as well as certain Wallabies during the NRC.
There is only a few spots left IMO for the RWC 31:
Props:
1. Sio
2. Kepu
3. Holmes
4. Slipper
5. [x] Faulkner, Alexander, Smith, Robinson- Will need game time during the small break after the All Blacks game in lead up to the USA clash. IMO you have to take a 3rd THP & that's Faulkner for me.
Hookers:
6. Moore
7. TPN
8. [x] Hanson- Have to choose a 3rd string hooker to the RWC. Easy selection.
Locks:
9. Skelton
10. Simmons
11. Horwill
12. Mumm
13. [x] Douglas, Carter, McMahon- Can see Chiek picking either Douglas or Carter coming back from injury as 4th choice Lock. Both proven at test level and adds size to the pack for both set piece options. Would not necessarily mean Mumm would shift into the 6 role but he would add cover with the current back row stock to shuffle around during the tournament.
Backrow:
14. Fardy
15. Pocock
16. Hooper
17. Palu
18. McCalman
Scrum Half:
19. Phipps
20. Genia
21. [x] White- Big selection will be if they take 2 or 3 specialist SH's. It will have a factor on now many Outside backs you decide to take. White's long distance kicking could snare him that position.
Inside Backs:
22. To'omua
23. Giteau
24. Foley
25. Cooper
Outside Backs:
26. Israel Folau
27. AAC (Adam Ashley-Cooper)
28. Drew Mitchell
29. Kuridrani
30/31. [x][x] Beale, Lealiifano, Tomame, Horne, Speight- If White is selected only two OB will be chosen. If he misses selection Giteau will fill that spot which could see a potential IB spot cover open up with Lealiifano next in like to take.
Next four cover options;
1. Douglas*, Carter (Super Rugby)
2. McMahon*, Higginbotham, Gill (BR)
3. Lealiifano*, Kerevi (IB)
4. Speight*, Tomame, Horne (OB)
[x] Remaining RWC spots
* Next inline pending injury/selection
EDIT: Good spotting from Benaud missed Kiridrani