Alternate History: Seven Days to the Rhine

Not sure if this is the right forum...I apologize in advance if I should have posted this elsewhere...

What happens if war broke out in Germany, c. 1984, and the Soviets ended up using their "Seven Days to the Rhine" plan...

https://en.wikipedia.org/wiki/Seven_Days_to_the_River_Rhine

At the end of the seven days, the Soviets have "won" in that they now occupy most of Germany. Parts of Western Germany have been destroyed, along with with most of Denmark and Poland, but France and Italy have been left untouched and the U.K. has only been hit with conventional weapons. (Lots of them, but just conventional ones.) Aside from naval actions, in which nuclear cruise missiles and torpedoes are used, the United States has been left untouched, too. The Soviets do not want to risk a strategic exchange with other nuclear powers and because the United States does not want it, either, the world dodges a bullet.

Basically, I'm assuming one ends up with a limited nuclear war because neither side will use nuclear weapons directly against the territory of another country with nuclear weapons, which could lead to either a Countervalue or Counterforce exchange. Thanks to France making noises about how any attack with nuclear weapons against France would lead to a Countervalue strike, the Soviets assume the U.K. and the U.S. might do this, too, and they draw the line at tactical nukes used against non-nuclear allies and forces at sea.

On a scale of one to ten, with ten being "yes, that is how it would happen" and one being "no, utterly implausible," how plausible is this course of events? Could we have really dodged the global nuclear bullet if tactical nukes had been used?

Just curious...what would have been the Soviet objectives here? Just keep their forces alive and get them to sea so they won't be blown up in port? Destroy as much of NATO's naval power as possible, just for sake of keeping the enemy as weak as possible and preventing future attacks? Or would it be more aggressive, with an attempt to blockade Europe and keep American forces from getting to the U.K., Italy, etc., again to keep the West in a weak position and get them to give up on Germany and to do so as soon as possible? Or something else? Am I missing something?

So what happens next?

Western Europe is in bad shape...something like 50-100 tactical warheads have been used on both sides. Radiation sickness, fallout, etc. will be a big problem in the near future.

How does the West deal with a "new world order" in which NATO has been dealt a huge body blow, Germany and what is left of Denmark are under the control of the Soviets (who now have the warm water ports they always wanted), etc.? The superpowers have probably lost lots of ships and aircraft on both sides, and the effects of nuclear weapons are now horrifyingly real rather than theory or science fiction.

Does the war continue? Perhaps the West accepts that Germany is lost, but how might they try to punish or weaken the Soviets on the world stage in other ways? Or would they start planning for a new invasion of Fortress Europe and the liberation of Germany?

And how does the rest of the world treat the Soviets after this? Which countries gravitate closer to the Soviet "winners" and which countries are now even more hard line anti-Soviet?

Thoughts? Observations?