I guess i am a purist in that I have not A. disconnected the hicas, B. disconnected the ABS, And C, removed the alsd. I am on stock brakes with basic mods but i have dragged, skidpanned and sprint ran the car around qr and even with stock suspension I can honestly say it is the most predictable handling car I have driven to date.
I read where those with hicas cant wait to get rid of it and the same with alsd. I am thinking the combo of the 2 may just be all that and more as neither of them have given a moments trouble. The ALSD is in fact the most reactive diff I have ever used and I hope and pray it holds up when I go full mod. Given that it is basically the gtr rear end I am quite confident it can handle some work.
I feel no tail wiggles when cornering and the car has a very neutral feel to it unless I try to over power it in which case the diff and the hicas step in and make the correction allowing me to carry the extra speed quite comfortably through the corner. I am sure that without it I would have spun on more than one occasion or at least have to make major steering correction to keep it on the track and going forward.
On the skidpan the car was among the quickest there despite having the lowest mod level. On the timed wet to dry dry to wet segment only one car (gtr) posted a quicker time and again i atribute it to the above mentioned features. The diff just grabs the car by the arse and holds it in place. The skidpan is an ideal place to actually feel your hicas working for you too. Your car can be moving at around 30/40 kph but the wheelspin can be anything, especially if you are in third. The hicas to some extent can prevent understeer by allowing the back to come around more easily.
At the strip I initially had issues with the diff as it was single spinning but as I used it more it simply came in to its own and now i wouldnt part with it for quids. I am guessing that being an unraped car it had probably mever been in a situ where the diff actuated and it simply needed some action to get it working.
Until any of these features give me trouble i am more than happy to stick with them as I have seen only benefits to date.