Another Consideration
It does not appear that anybody has yet mentioned another consideration: what kind of ramifications - namely, assistance and technical expertise to get you out of there ASAP - can you expect if you return? I would think that, in the case where there was a bang and everything, including engine performance paramaters, seemed normal after that, the crew could have suspected compressor stall or some other ambient factor and decided that it is better to continue to home base than to return to SVO to get stuck for who-knows-how-long?