Coilovers are definitely better IF the roads around you are NOT terrible. We do get some pretty decent winters here in the DMV area, but normally the roads are not as bad as in say, Boston or Detroit. Those conditions may exceed the available adjustability in the coilovers.
As far as ECU tuning, I believe the 13+ (FoMoCo can correct me on this) do go 100% RWD on hard launches, just long enough to get going, then back to normal FWD/AWD logic.