I really liked the first couple books and they indeed got me hooked enough that I was able to pull myself away from working for a few days on the Stardock Summer vacation at least (10 books in a week is a significant commitment in time).
I need a new series.
This happens a lot with series now days.
Tied to the fact the writers get paid by the word and many should have been a stand alone book, have not read the Safehold so do not know if this fits with them I am talking in general.
One of the worst at this is Harry Turtledove.
Most if not all his books are excellent, till he writes a sequel, everyone goes downhill from there.
Add the fact he has to add word after word to fill out the pages.
I quit reading him the 3,250th time that he told us that Odin Cursed sailor sun-burned if he was outside for more than 3 minutes.
Cannot really suggest recent books for you not knowing your tastes that well.
A few old ones that are good are H.Beam Piper's "Fuzzy" and its follow-ups' and the Lord Kalvan of Otherwhen.
You've likely read the Weber/White Starfire books based on the old board game. If not they are good SF based on the Starfire Board game.
Would not mind beta/ moderating that one for a certain game company.