The Russia/Belarus joint exercises were due to end on the 20th. So what happens then with the north-of-Ukraine units (either no movement, overly tardy stand-down or even hasty movement over to the east of Ukraine and/or Crimea) might be a bellweather for the exact future expectations by Russia.
There are several interesting satellite images out there. Not sure how typical they are of 'typical exercise infrastructures' but there seems to be concern that various field hospitals, excavated firebases, river-spanning pontoons, massed ranks of helicopters/mobile artilliery/etc are just a little bit... numerous... to be just local exercises. Even combined-forces training. And that they're being conducted on three sides of Ukraine, including with units shipped in from eastern Siberia, seems deliberate.
If we're lucky, it's a deliberate message only. "We could, you know..." I find it hard to believe it's telegraphing actual intentions (even under the 'guise' of perfectly-normal-exercises-nothing-to-see-here) when there are so many other things that they could do/could be doing to fly under the almost omniscient 'radar' of the modern orbitally-serveilled and social-media-recorded world. The current Judo-Chessmaster in charge is surely not showing such a plain and open hand.
(If this is the distraction, though, then who knows what is the true intent? The modern-day Red Storm Rising scenario is going to be complicated, and have far more complicated reasoning behind it than a non-existent lack of fuel oils.)
The next thing that worries me is the clear calls that there may be a False Flag attack upon/by the Russian side, to spark things off. But mostly because what better cover for an actual false-False Flag by 'us'. Not that I think Ukraine/whoever is likely to try, but such a spark could ignite things just as easily no matter what the source, or intent. There's already raised interaction over the disputed areas of Ukraine (excepting fait-acomplis Crimea), as noted, possibly due to the increased tensions, suspicions and/or aspirations.