But that's a fundamental difference between gaming and books in the first place, not a symptom of varying levels of quality with Trek in particular. Very few games from 20 years ago play at all similarly to games now, but you can pretty much read a novel from 100 years ago no problem.
I mean, more people play Star Trek: Online than have ever read Star Trek: Destiny, for example.
Saying that this continuity, by your definition, in some way makes the Trek novels superior to the Trek games is a fundamental misunderstanding of format. It's like saying "I've watched five (six, actually) Trek TV shows all come and go, but there keeps being a new novel every month! The novels have a proven longevity where the TV shows don't." Well sure, but it's sort of a spurious comparison, yes?