The problem with redirecting NS2 to Kaliningrad is that gas demand there is already pretty much fulfilled, and unless there is a population and industrialization boom over there its not going to go up steeply anytime soon.
Any gas they do get would come via hostile neighbours country pipes... they might get cheap rates but Russia would still have to pay the countries the gas transits to get there transit fees which means it costs Russia. That is fine because delivering cheap energy to Russia is something Russia should be doing anyway.
Just looking at a map, to get piped gas to Kaliningrad means crossing the borders of at least two countries from Russia... Kaliningrad shares borders with Poland and Lithuania, and for Russia to get gas to either of those two countries it would have to go through Belarus or Ukraine or Latvia.
Belarus might be friendly now, but Poland and Lithuania are not and nor is the Ukraine.
Gas piped to Kaliningrad cannot be used to bypass the Ukraine because Poland wont connect to Kaliningrad and supply europe bypassing the Ukraine... Poland and the US are the countries wanting Russia to continue using Ukraine as a transit country.
But look at the trade history of europe... trade for Russia was tiny with the east even just 15 years ago and was about 100 billion with Europe.
Since Europe has been told not to play with Russia that trade has taken a real nose dive, but trade with China in particular has taken off.
Europes gas energy needs might be increasing, but is not Russias problem... they tried to solve supply irregularities caused by Ukraine stealing gas meant for other customers, for which Europe blamed Russia. Nord Stream II and South Stream II were intended solutions to prevent unreliable supply of gas to customers on Europe, but Europe and the US have taken measures to block both projects.
Russia is not going to have problems selling gas... everyone needs energy and compared with coal it is relatively clean.
With US encouragement the EU is pushing Russia away so Russia needs to accept that the EU are self harming nutbags and look to how they can sell the product they have a good supply of. Liquification and then shipping world wide without needing pipes makes the gas more expensive but also more valuable so you spend more delivering the product but you get more money for the product to cover your costs and it frees you to sell to anyone.
Right now cheap gas in Kaliningrad is probably being heavily subsidised by Russia paying transit fees to keep costs down...pumping it directly means they get the gas cheap without two other countries making money on the delivery for effectively doing bugger all except collecting transit fees.
Also, like I have said it before, for selling the NS2 gas as LNG, it would be much quicker and cheaper for Russia to construct the LNG plant right at Saint Petersburg or Ust Luga.
It is a question of using a pipeline that is already 3/4ths built.
Russia would remain committed to NS2 till the time Germany itself backs out from the project (which is still a very low possibility). If that happens, I think Russia would just redirect its focus on selling more Gas to China and Asia and let the NS2 pipes sit there at the bottom of Baltic, till the time Germany gets stung by freedom gas and comes crying back to Russia. At that time they can sign and new contract with Germany, with a "slight" adjustment of prices.
It would be important to look at the contract details... a cancelled contract might allow companies to recover costs by recovering pipes and selling them to offset the money they lost in the venture... which could mean the whole thing gets lifted up. There will be pumping stations along its length where the turbines and equipment could be recovered and reused somewhere else.
Personally I would like to see them build a gas pipeline that goes down through north korea to south korea and then across the water to Japan so Japan could get cheap gas energy, and so could South Korea and North Korea and South Korea could earn transit fees and relatively cheap gas supplies.
The US would have a shit fit of course... if Germany and South Korea and Japan are lucky they might threaten to withdraw all their soldiers from all three countries....
I've never had much faith the Eurostani 4th Reich, and events are unhappily proving my skepticism to be well founded.
They fall in line on cue to sing the same hymn, whether it is highly likely poisonings, or election meddling... how can you treat such morons seriously?
Honestly when the US economy falls over their paper money will be worthless which will have traumatic results for Europe too... I mean traditionally rats don't abandon a ship till they think it is sinking, but water has been coming on board this ship for decades... they got to first class cabins and refused to continue... will they jump ship or go down singing and totally in denial...