Game is good and cars feel good, including wight transfers, so I have no idea why people are complaining, could make the obvious username quote joke but to easy
( I'm talking about PC version.)
Grid is the worst racing game that has been released in the last 10 years for steeringwheel users, even NFS HP does a better job and that game is awful with a steeringwheel. So if someone likes that feel, I'm not that surprised he might not be a fan of a more realistic kind of racing game. Grid cars were about 10/20 seconds a lap faster than their real live racing counter parts, so that extra level of grip might explain the "more weight feel", but it is not realistic at all.
I'm pretty sure SimBin had nothing to do with it, as they have absolutely nothing to do with the entire game. Yes a part of Slightly Mad worked at the former Blimey Games and a part of that worked at SimBin before the split.
SimBin does it's own thing, add-on packs to the Race07 series right now and Portimao is as good to drive on as the racing on it's real live counterpart
As mentioned before, the MOD community that "fixed" Shift has no interest of fixing Shift 2 physics/input, as they think it is already good/working. So no doubt few minor things might be modified/changed, but I would not expect something as big as the overhaul MOD for the original.