The way I look at it is that we have 4 certain first team props in Cross, Davies, Pickersgill and also Mullally. I also think the club do view Kavanagh as a SL prop so making 5. Then Winterstein has also played there and with a fair bit of depth in the back row not a bad option! Plus the youngsters like Gerrard & Jack Smith could get a few run outs.
Don't get me wrong i'd like another one allowing us the option to use Kav elsewhere but wouldn't say we are 'desperate' just yet which is why the club has probably took their time thus far.