Cassini has detected ionized particles and radicals being ejected from Enceladus, not ice crystals or liquid water. This is to be expected under the EU framework, what with the rain of electrons (I mean electric current) incident upon the south polar regions. "Surface churning" — or ionization? I vote for the latter under electron bombardment. Electric field acceleration of these now-charged particles away from the surface of the little moon is as normal as coronal mass ejections from the surface of the Sun, albeit in a low-g environment. Those particles are at escape velocity from Enceladus, and are "bent" or steered into becoming Saturn's E-ring, the plasma ring in which Enceladus orbits.
Unanswered questions: Have these scientists conducted any
experiments in electrochemical labs to see if fullerenes can pick up oxygen and safely transport it down through a methane atmosphere? ("The Smoking Lamp is lit, gentlemen!") Once there, what life-like conditions are created thereby? Is it water-based life, or has water ever been observed on Titan? Do fullerenes have a specific electromagnetic signature, such as reflecting or absorbing light at a particular frequency(ies) as a reliable signature, and have such signatures been observed at Titan? Why do the photographs of Titan's surface from the ground look so much like Venus's or Mars — dry, sandy, rocky, scarred? Any oxygen tied up in those silicates, etc.?
The authors of the papers quoted seem to "suggest" a great deal without actually having good observational data which points directly at their assumptions and ideas. Building a model which is mathematically or chemically plausible is not the way theories are (i.e., should be) developed using the scientific method. So far this is a bunch of so-far unsubstantiated assumptions and what-ifs. They could
be right, but observationally so far there is little hard evidence apparent to qualify the positive tone taken by the article.
Business as usual.