Some people have short memories.
It's only been 6 months since another SSJ-100 (Aeroflot) made an immediate return for an overweight landing, bounced, broke the main gear, punctured the fuel tanks, and killed 41 in the ensuing fire.
One month ago today (Sat.) criminal charges were filed against the captain of that flight.
Who thinks (or doesn't think) that factored into the Yamal crew's decision?
Some engine-outs are immediate "MAYDAY" situations - and some are not. Gotta take them as they happen.