Without witnessing the interviews it's hard to judge each applicant other than basing it on their past record as player and more importantly coach.
Hinkley
Pros:
Playing record: Played in 2 or 3 of Blight's Geelong runner-up sides after let go by Fitzroy. Finished 3rd in 1992 Brownlow.
Coached own side at lower levels: 3 Flags as senior coach in Hampden and Geelong leagues.
Been an Assistant coach: 7 years - St Kilda under Blight (2000) + Geelong under Thompson (2004-9) including 2007 flag. Was at Geelong end of 2006 when they had that "club culture review".
Cons:
Lesser profile than the others although well respected.
Hardwick
Pros:
Playing record: Dual premiership at Essendon under Sheeds and Port under Williams after being let go by Pagan at North. A reputation onfield of being hard, tough and ruthless. Current players would be more familiar with his playing days than the others since he retired only 5 years ago.
Been an Assistant coach: 5 years - Hawthorn under Clarkson (2004-9) including 2008 flag. Was at Hawthorn for their second rebuild (similar to us now where we have plenty of youth that needs to be developed while cutting the deadwood).
Cons:
Never coached a side/club in his own right.
Has missed out on two jobs he's applied for previously (three if you believe North's spin).
Richardson
Pros:
Coached his own side at lower levels: East Burwood (EDFL) and Coburg (VFL). Two flags with East Burwood (1999-2000).
Been an Assistant/development coach: Bulldogs, Collingwood under Malthouse and now Essendon under Knighter.
Cons:
Unlike Hinkley and Hardwick hasn't yet experienced an AFL flag as player or as assistant coach. Missed out on the Pies 1990 flag.
Rawlings
Pros:
Coached his own side: Richmond (as caretaker) and Coburg (VFL).
Been an AFL Assistant coach: Richmond under Wallace.
Would know the current RFC players first hand. Strengths and weaknesses in detail.
Cons:
Never experienced an AFL flag as a player or coach.
Less experienced than the other three.
Caretaker role has gone downhill big time in the last 3 weeks since a promising start.