The CVR should be able to pick up the sound of the rain to prove or disprove some reports of a wall of water.
IF the noise of the rain was of a high decibel level, we may also find out that the crew may have had trouble talking to each other with proper flight discipline lost.
On past engine wash outs it wasn't the rain that you hear on the CVR it was the hail.
Rain alone is not the problem as it gets centrifuged out the fan, The problem is the inertia of the hail which overcomes the centrifuging effect.
In order to do it with water alone you would need extremely low engine rpm and a rain storm of the likes never documented in a flight encounter.
I don't mind all these various what-if theories being expounded here as long as we accept the investigation findings when they are released.