I've been following the Russian PPRuNe equivalent site since the first reports,
They reached page 40 while we still hadn't hit page 3 here and they are just about to reach page 100.
A vast amount of dross to filter but some pertinent points to pass on.
The AN 148 aircraft were from the Russian production line rather than the Ukraine.
Rossiya bought them but were unhappy with maintenance and reliability.
They later dry leased 4 airframes to Saratov.
The helicopter mid air claims were generated by a single news source and immediately debunked by the Russian Post Office.
Hours of in flight breakup conjecture for the usual host of potential reasons crushed by the cctv video. The aircraft rode its wings and tanks all the way to the ground and it had a tail to enable impact at such a low angle.
FR24 and other software fans claimed immediately that the entire 148 fleet never produced ADSB speed data and ground interpolation of position and time stamps is the only way speed could be displayed. For various reasons Saratov were restricted to internal flights plus a small handful of former Soviet states. Thus the lack of knowledge outside Russia regarding data integrity and absence of any usable granularity.
That final point above is the most important of all for the FR24 junkies out there already building their maps and theories.
Rob