Oh it's not cheap alright, but than again Russia has always been a country which invests heavily into military instead of its civilian population. So whether it goes into useless drills or SATAN missiles which will never be used...Moving troop around like this is really not cheap and as much as he try to put a positive spin on it I don't think anybody is going to miss that he had to back down, even domestic audience. I can't think of any significant concession anyone did so I don't even know if he even got something in the end.
Will be interesting to see if nordstream 2 is given the okay after this, I know if I was a European energy minister I'd be doing everything possible to make sure my energy supply can be completely decoupled from Russian source at a moment notice.
In a way, it's possible that Ukraine is the biggest winner in all this (again, assuming Putin is really backing down), they got a bunch of stuff and know a lot more what kind of support they'd get from the international community. I also imagine that turned the population even more sour on Russia.
Nordstream 2 will get a green light if Russia doesn't annex new parts of Ukraine. Germany's stupid campaign against Nuclear energy has lead to this inevitable necessity.
As of now you're right Ukraine has scored quite some diplomatic points. But all the panic probably hit its already fragile economy. And in a way this may also be why Russia continuously plays "pretend invasion". By creating this continuous sense of threat Ukraine becomes much less attractive for foreign investments.