There's another reason. The Vicki Nuland installed government in Kiev had a bunch of Soros goons wrecking havoc across all of Ukraine from Jan. 2014. They shut of electricity to Crimea. Shut down a canal providing fresh water from the Deiper. Gas to Donbass.
What could they do to the nat. gas transiting Ukraine to Central Europe. The control of that was in the hands of the 0bama regime. Russia/Central Europe needed a secure transit route. Hence, Nordstream 2. Maybe with the newly elected government those existing pipelines could be secure again..