Yes I agree a nationwide S92 fleet would have been a better option but I am sure the coffers would not allow as this was one of the options originally. If the state does not want to pay for the better option then there is nothing we can do about it.
Although the 189 SAR is not yet certified and yes we all know there are likely to be teething problems for maybe a while to come but it is maybe the best we can get for the money unless you have any other cabs in mind.
Judging the 189 cab from a computer generated picture will not give you a realistic idea of the cabin size. Granted it's not the size of the SK but nonetheless I think you will find it bigger than you are thinking/criticising.