Although the quota system is beyond me, I do reckon that at no time can you exceed it.
So, as it stands at the moment, Pritchard is still on contract.
Michaels is currently without a contract, so not taking a quota space, giving us the sensible option of signing Kelly early.
When Pritchard leaves, Michaels or someone else can then take up the free slot.
Hence the delay in any announcements regarding Michaels.