I think HotD needed another episode between 5 and 6 and another one spread out the whole season(12eps). It feels too compressed and the story needs to breathe a little. The big time jump needs to be more subtle etc (it leaves too much for the viewers to fill in)

I would go with GOT peak as there was not a single thing I remember that I could critisize.

But weirdly, I like HotD more and I am more invested. Probably recency bias idk.