I've caught up. A Stephen Moffat story, which might account for the improvement. Moffat is very good at getting just the right pacing.
There always has to be a "message" with Nu-WHO, but as far as computer-simulated wars, computers-gone-wrong and "allegorically powerful, common sense implausible scenarios" go, I think Kirk's Enterprise has been there first, on several different occasions, and quite a long time ago too.
At least the Doctor didn't have to defeat the mainframe and murderous AI algorithms with "Pure Logic" though, but here it was "parent power" and a father's love that achieved it - aw shucks!
More "Snow"! Yes, I think the "snow" is certainly going to be a story arc this season.
In retrospect , what might have worked out better is if they kept the half hour serial episodic format of the old show and simply upgrade a few things , first off no use of tape , film only , upgrade the special effects and props which could have done without breaking the bank, eliminate the whole companion romance crap, that never worked at all.