Dropping out of Super Cruise with speed over safe blue zone can cause damage to your ship hull.
If you fly too close to big object your speed will decrease and if you keep flying closer your ship will initiate emergency stop and if your speed is over safe zone you can receive damage.
The spinning has been toned down for a number of reasons – it never really felt like the right solution but was quick to implement (and caused all manner of motion sickness in oculus!). What we're moving towards (it now works like this but isn't correctly balanced) is that dropping at low speeds even uncontrolled is a relatively simple affair. The faster you're going however, several effects will start to happen (in no particular order):
Substantial heat generation.
Spin as before (but largely reduced).
Something that internally has been dubbed "ghost controls": To simulate your flight systems getting somewhat scrambled, flight assist is turned off briefly (if it was on) & small random thrust forces are applied to the ship as the thrusters try to regain control. The better job the player does in cancelling out the spin manually, the faster the effect fades out.
In future we may also have ship damage & module malfunctions keyed to uncontrolled drops and/or interdictions (they're different) – that's an open question.
Flying too close to big space bodies will mass lock you and drop out of super-cruise
When you are flying close to a big body you will slow down and if you still move towards it you can be dropped out of Super Cruise in Emergency Stop.
Just try to fly around those objects, you will see the Mass Lock zone around planets and stars as a line.
You will also see IMPACT and PROX warnings.