While this doesn't prove anything, it certainly is a curious coincidence to stumble upon while looking for activity of people that might have had a motive (or helped with an effort) to frame Russia.
US visitors that day also have ties back to events surrounding the Ukrainian 2014 revolution and/or reporting on it (with the exception of Kuklish who is an English-Ukrainian translator) and most had worked or were working in the State Department.
It's worth nothing that Nuland and Pyatt were both embroiled in a diplomatic crisis in 2014 when a conversation they had was posted to YouTube showing that the US was interfering in Ukraine's politics (The State Department and the White House blamed Russia's vice-president Dmitryi Rogozin for the leak.)
I'm not going to get into speculation. I've let journalists who have written extensively on the Ukraine coup know about this and will leave this up to them to pursue, if they wish to.
A closer look at the actual booking/arrival times, room numbers, other visits, etc. shows that, on the 15th, there were effectively 2 meetings. One of which had at least 18 individuals attending (Stoliarchuk is listed at 1:30pm and 2:00pm) and another with at least 4 attending.
http://g-2.space/jb/