Hmm, the strikes and disruptions still seem to be going on. Depending on how much French you understand, websites such as lefigaro.fr and lemonde.fr give a reasonable idea of the disruptions.
I went on Eurostar with younger daughter. St P to Lille outward on 12 Dec and back on 15 Dec and we were lucky that our trains were not cancelled (possibly as they went onwards/originated to/in Belgium).
From what I can understand from my "schoolboy" French, it does not look like a solution is close by :-(