SPOILERS - maybe
I believe this book will give us the ICN seizing the entire Gulf of Dohlar, the Battle of Gorath, and Dohlar being driven back to its borders and cut off from the rest of the CoGA countries. Check the map, it's surrounded by water Silkiah, and Siddarmark. It may have 97 million people (which oddly enough makes it one of the most densely populated countries on the planet, but its military is gutted and its capital is going to suffer a major naval attack, which may include commandos, the destruction of its navy, and the capture and possible execution of its king.
The next book should have the ICN steaming into Temple Bay and the ICA seizing the Temple and obliterating the Temple Guard and Inquisition under Clyntahn's command in the area. Clyntahn will also meet his maker. Too bad the CoC has renounced the Punishment, since if anyone ever deserved it, that narcissistic sociopath does!
Delthak is simply too large and spread out for a major industrial accident, and most of what it does and produces simply isn't explosive. There might be some snafus with the smokeless powder when it becomes available, but nothing on the scale of the Hairatha powder mill sabotage. As lyonheart pointed out, production is starting up in several other locations as well, further mitigating the damage any "major" accident might cause.
I agree that the title of HFQ denotes the doubts the CoGA will feel as its armies lose battle after battle, despite theoretically having God on their side while battling heretics.
The "rebellion" in Chisholm is only a question of time. Since the inner circle is expecting it and has SNARCs listening in, there won't be any surprises. Basically it's a process of giving the rebels enough rope to hang themselves. Don't forget that there are thousands of troops being trained nearby from across the empire who
love their emperor and empress, and that devotion approaches idolatry among the common people of Chisholm where Sharleyan is concerned. Any attack on the Empress will end quite badly and bloody, and will get rid of the major impediments to industrializing Chisholm. A nasty TL priest or two will hang, along with a few nobles. Entertaining, but not a threat.
The MHoG is both dangerous, yet unwieldy. If its 600,000 rifles could be brought into battle at the same time, it would be a devastating force. Stacked in a line 3 deep, it could form a firing line more than 12 miles wide! Of course keeping that line supplied with food and especially water during battle would be utterly impossible, as would the logistics of keeping it supplied if it remains in a single group. Should it split into north and south armies and head for Guarnak and wherever Kaitswyrth is hiding (if he's still alive by then) its logistics would be more feasible, although if the ICA manages to cut off the canals and rivers behind it, the MHoG couldn't live off the land and would suffer the same fate as the AoS.
EHM could harry it the entire way down the Daivyn river with dragoons and howitzers, and the death toll his artillery could deal out is almost unimaginable. Depending on whether BGV has trapped or eliminated the AoSG, he could do the same as the CoGA engineers attempt to repair the canals, without which the MHoG cannot advance.
Magwair really needs to split the MHoG into multiple armies since it's so massive and difficult to supply, but Clyntahn is unlikely to go along with that. It's quite dangerous, but I'm not entirely sure whether it will do more damage to the allies or the civilian TLs.
That's my 2 cents for HFQ militarily, and by the end I expect the recapture of all of Siddarmark to be inevitable, since the CoGA's armies should be retreating or destroyed.
Next year, on to Zion!