I know: me too.
Sounds like I really need to give Among Others by Jo Walton a try.
Perhaps 'conclusion', rather than end, then. Was thinking end of the book, rather than the series. Having said that
I know that Book 4 of the series, The Black Mausoleum, is being published soon (at least in the UK). If the series is continuing then your statement puzzles me?
the death of a main character, dragons attacking the Adamantine Palace
is pretty conclusive. Perhaps it will become clearer when you've read the book.
so I personally can't agree that it was a slow period.
The 'lull' refers to the number of books published, not necessarily the quality.
Traditionally the month post Xmas is a quieter time for book releases, I understand.