Also, certain elements of Duane's history of the Romulan War were flawed from the start: Sarek would not have been capable of negotiating the peace, for example, being a mere infant at the time (as was already clearly established in TOS).
There really was relatively little else about the war in the Duane books, save for the idea that the Romulans hijacked two Earth starships for reverse-engineering of their technology - which actually dovetails nicely to their ENT and ENT-novel habit of hijacking Earth starships by cyberattack (and is also described as being a late 23rd century Romulan modus operandi in Duane's own, later
Bloodwing Voyages stories).
Nothing about the current stories really contradicts the Duane idea that an Earth vessel named
Carrizal would have visited and scanned Romulus, thus forcing the Romulan hand in starting an all-out war with Earth. It's just something our ENT heroes wouldn't be aware of, because Duane writes that not even the
Carrizal crew themselves realized what they had found.
Of course, Duane's Remus is merely "arid" rather than an apparently airless hellhole, but perhaps that's just an euphemistic Romulan way of putting it.

And Duane joins the old bandwagon of Romulans lacking warp drive initially, but that could easily be ignored and merely taken to mean they had a more primitive type of warp drive and thus benefited from stealing a better one from the Earthlings.
I like to pretend that Duane got most of the story "right", even though some of it has become more legend than fact in Romulan telling and retelling - and that the things described in Duane's
Romulan Way did take place in the background, shortly before the open fighting we see in the recent novels. Although I also am dismayed to find the newer novels singularly uninteresting and uninspired, both in general and in their description of the war.
Timo Saloniemi