It's worth noting that the STO history doesn't diverge overly from Treklit. The Needs of the Many, for instance, cites pressure from the Gorns' various allies--the Romulans, Tzenkethi, Breen, Tholians, and Kinshaya, i.e. the other Typhon Pact polities in the main Treklitverse--as key in preventing an early outbreak of Gorn-Klingon war.
Sure, the folks who make STO have borrowed some concepts from Trek Lit, just as they've borrowed concepts from a lot of other sources. But they've also blatantly contradicted a lot of Trek Lit continuity, particularly where DS9 and VGR are concerned.