I would adopt from a rescue that:
Was trying to properly rehome rabbits and not 'recycle them' - by this I mean - actually trying to help each individual rabbit in turn and if this means taking a while then so be it. There are many reasons for this.
Where the person running it was knowledgeable and continued to learn.
Where there are written down standards so that each person applying knows what they would be aiming for - at the very least the rescue would be seen to be educating those who contact them as to what a rabbit needs.
Where the rescue actually gets to know the rabbits concerned. It would both help the rabbit find the most suitable home and help the people wishing to adopt to know that they were picking a rabbit or rabbits that would suit their set up, lifestyle, existing animals/rabbits, would be better indoors or out, if there are any ongoing health issues (impossible to do if the rabbit is only in for a few days before rehoming).
Where the rabbits are checked for illness/prior to them being rehomed and that any issues are explained to the new family prior to adoption rather than last minute before signing over.
Where the rabbits are spayed and vaccinated (or where this is the norm - even if there are exceptions to the rule for good reason)
Where the rabbits are kept as well as possible. For me this might not mean the recommended minimum housing being provided the people adopting know the reasons for this BUT, where an example of the minimum expected set up is available to view so that the potential owners understand what is required and can get ideas.
Where any animals kept at the site belonging to the owner and on view, are also kept in proper conditions and with company - to set an example.
Where there is a contract between adoptive individual and the rescue outlining the agreed conditions that the animals will be kept as laid out at time of adoption.
Where the rescue is able to offer support for the lifetime of the pet which might involve help and advice or hands on help.
Where the rabbits can be introduced properly (bonded) prior to adoption to ensure that they are happy when they go home and any potential problems are less likely.
MMmm think that's if for now.
(in case it's not clear - this is how I try and do my rehoming and not a criticism of others who rescue)
Helen