It's not really about "more steering" its the same theory as Ongaro's setup and how JQ is setting up his car. youll find on high traction it will help with how the car rotates as it will make it smoother, however on low grip it not allow the car to transfer and force the rear wheels together to create grip(bad explanation but for my brain to understand). on extremely fast very bumpy tracks these should work as the car shouldnt grab the ruts.
I have purchased both and am going to test other suspension tuning to see if its possible to use these parts but still generate grip for a intermediate racer. i feel using more caster and more front droop with a one step lighter rear spring.
Only my thoughts on it from running a prototype i got made when i first saw them, we're also running a modified split centre diff (custom cnc bottom halfs with tops modified with a cnc machine to make it all slot together.