So they're coming back to internal icing.
I suggested just that a while ago (allthough maybe with a somewhat different reason, but nevertheless -> engine icing)
http://www.pprune.org/forums/showpos...7&postcount=75
and was ignored.
Be it as it may: In descents, specially after LH flights, I aim for a continuous descent, but with a small part (around FL100) needing a power increase. Just to check. Furthermore if there is the slightest moisture and T's around -10 to +10, it's EngAntiIce on and not only auto. Inflight if I detect crystals around the wiper, again it's EngAntiIce on.
I've done that with JT8s to GE90s and I truly think we will be instructed to do so again in the future by the regulator, manufacturor and airline astronauts - who will then by the way take all the glory of having invented modern aviation again ......