Blacktongue Thief is really good, I think I posted about it here. It doesn't have multiple POV and as such the scope is somewhat less grand I guess than what you're looking for.
Allow me to recommend
1. The Shadows of the Apt series, by Adrian Tchaikovsky, starting with Empire in Black and Gold
Epic fantasy with a steampunk flavor. Big world, lots of history, factional politics, magic, spies, war, betrayal, and giant insects. Completed series. The first 4 books can be read as a single story arc, but there are 6 more if you want to continue.
2. The Psalms of Isaak series, by Ken Scholes, starting with Lamentation
Epic fantasy with ancient technology, weird magic, politics, betrayal, spies, assassins, big scope, secret history, and ancient powers awakening. Finished series, 5 books.
3. The Moontide Quartet series by David Hair, starting with Mage's Blood
The 2 continents are preparing for war again as the bridge that links them appears again after 12 years. War, politics, grand scope, mysterious magic and arcane powers. Finished 4 book series.
4. The Bloodsworn Saga by John Gwynne, first book The Shadow of the Gods
Second world, but norse-inspired with fairies and gods, magic, longships, ancient feuds, a quest to find missing children, secrets and betrayal. Books 1 and 2 are out - I haven't read the 2nd yet. There are more to come.
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I'd also like to add that Evan Winter's "The Burning" series, starting with Rage of Dragons is really fresh, and an excellent read but mainly uses single POV character and the first book is not as grand in scope as you might like. Like Blacktongue Thief I highly recommend it but it's not exactly what you say you're looking for.