Easy does it.
lets keep it simple.
Aircraft leaves point A for point B.
Aircrew become aware that something may not be A okay with the engines.
Using the systems available to them they investigate which leads onto consulting with company/engine tech staff.
The Capt makes the u-turn decision.
On way to Alternate engine stops.
They land.so what?.
Engines fail now and then. Even big ones on big planes.
If it happens again tomorrow,the result will probably be the same.
The crew made decisions based on the resourses at hand and using their training/experience made good a bad situation.Well done.
Let the Ppruners run off at the mouth if they wish.This is a rumour network after all.
If you can't stomach the rubbish that some people will say about this incident then don't visit the thread.