Yes that's the temporary solution (using date and time) but it doesn't catch time changes/preemption, doesn't follow series buffer times, and adds the word (Manual) to every recording, making them hard to find. MS is supposedly working on it:I can confirm that my guide is also missing the "original air date" for news broadcasts. I don't record any new programs so this will not affect me.
As a workaround for you, you might be able to record specific timeslots via the "add recording" function. Recorded TV > Add Recording > (either) Wish List or Keyword (or) Channel and Time.