Void bushes are designed to be stiff in one direction and compliant in the other, I racked my brains but could not come up with the term for a material that does not have uniform strength in all directions.
I was a race car constructor and driver and would use solid mountings, polybushes, rose joints etc where they gave an improvement but it was always at the cost of NVH (no loss) and maintenance, any articulated joint using poly bushes would wear.
I have yet to find an application on a road vehicle where any benefit would outweigh the disadvantages, certainly on any articulated joint they lose all the benefits of a rubber to metal bonded bush, that of being maintenance free, if they at least had a grease nipple it would be a start for those willing to go back 50 years.
I would actually prefer a vehicle that had a more direct connection through the controls and would be happy having to grease all the joints every 6 weeks, when I use a digger I grease all the joints before and after use, but modern suspension designs, the console bushes being a good example could not operate without compliance using rose joints and solid bushes, electric power steering was the final nail in the coffin AFAIK regarding control feedback.
Over a decade ago I was driving an old beat up high mileage MK1 Octavia, for the Téléthon our Lycée pro (motor trade) would invite the public to have their vehicles checked over in the workshops then washed & valeted, my job was to drive the vehicles through the various stations, most were newish vehicles, nearly all newer and better condition than mine, normally it would have left me with a desire for something newer and better.
It was not the case at all, all of them were huge, heavy yet confined, no knee room, peering over a high dash, narrow slits for windows, bad visibility whilst I was driving through the narrow path between the stations, the worst of all was the total feeling of disconnection between the controls and the steering, suspension, brakes etc, the absolute highlight of the day was a basic 80's Renault 5 which was a total joy, light doors that closed properly with smooth manual window winders, superb visibility, loads of glass and narrow pillars, sublime non power assisted steering, brakes, clutch and handbrake.
The drive home made me realise that the dog that it was, my MK1 Octavia was a better drivers car than any of them, when I bought a MK2 I liked how familiar it was but hated the huge A & B pillars and most of all the electric power steering, people said that I would get used to it and very sadly indeed I have but no amount of polybushes could make that or my current Yeti into the drivers car that the MK1 was, quite the opposite, I believe they would make it worse.
I have a clonk from the RH front suspension, it does not appear to be the new strut or top bearing nor the cheap drop links that I fitted so later on I will be checking all the suspension bushes, I will keep an open mind regarding poly bushes but only for any joints with a rotational element around the fixing bolt.