The suspension was certainly over exaggerated in IV, and could have done with some tightening up, but driving in V is practically the same as driving slot cars with magnatraction. It's fun at first, but after a few minutes it gets boring very very quickly. The physics in V over exaggerates the speed of the vehicles, and because of this the steering has been made overly sensitive and responsive - by "steering" I mean the ability of the vehicle to swivel about its central axis. When you're driving at speed and have to be very careful not to oversteer and collide with the inside of a very sharp turn, then there's something seriously wrong with the physics.
You know, I used to think the suspension on cars was exaggerated until I watched Motor Trend's Head 2 Head of the '14 Flying Spur vs '14 Ghost. Go ahead and watch it. At the very beginning you see the RR Ghost pushing hard into a corner in slow-mo and it rolls so hard that it looks like the left side of the saloon in scraping the ground. The Cognoscenti in IV, to me, was perfect after watching that. The only cars I felt were overexaggerated in IV as far as the body roll/suspensions were the Cavalcade, Presidente, Sabre(80's Faction-looking one), Buccaneer, Super GT, Willard, Huntley, PMP 600, and the Rebla. The other cars were either perfect or near perfect. The Hakumai rolls, but it actually has a firm enough suspension to make you "feel" the road's imperfections. Same with the Sultan and Solair. In V, every single damn car would make you feel every little bit of the road's inperfections- hell if you ran over a tiny pebble you'd feel it in V's cars. That to me is worse than "boaty" suspensions which don't feel like boats at all actually.
I actually like the exaggerated body roll and bouncy suspension on many of the vehicles in IV and find myself driving over kerbs and little bumps and watch how the suspension works, loving the feedback I get on the controller. More often than not, I take the SUVs or any vehicle with a high centre of gravity to the few hilly off-road areas in LC and have so much fun abusing the crap out of the suspension, bouncing up and down.
Recently, I've taken to speeding southwards along Montauk Avenue and hitting the rise just before Soldier's Plaza just to see how much air I can get through the centre of the arch and how far it can fly through the air. I noticed that the suspension had been tightened up a little on BoGT, but there's still a lot of fun to be had trying to do this with the exclusive vehicles in BoGT and TLaD.
It really p!sses me off when I drive the cars and motorbikes in IV, and the only place I can get a similar feeling is that bumpy road in Vespucci (you drive it in the first Franklin & Lamar mission in V), but that feels far too scripted and not so natural. The "car control" while in the air is a horrible addition. R* should patch it so that it can at least be switched off.
I really, really despise the over-exaggerated 0-70 mph in 3 seconds acceleration that R* gave the vehicles in V as well as the messed up braking (or rather the 70-0 mph in 3 secs speed drop the moment your finger comes off the accelerator trigger. If they've given all the vehicles high performance attributes giving you precision control in driving, why on earth make the collision and damage physics so forgiving? Oh yes, for the kiddies that haven't learned to take their fingers off the accelerator whilst turning corners and avoiding other road vehicles...I just answered my question.
I'm off for a nice leisurely cruise around Broker and Hove Beach in a Cognoscenti to relax a little now.