I've read the Legacy series and enjoy them, but yes, they do veer a bit towards John/Teyla in the middle, although they go back to gen again by the end. I always wondered, since they were officially sanctioned tie-ins, if TPTB told the writers the series was getting too shippy and got them to make it more gen again, but who knows. Rodney's certainly prominent towards the end due to a lot of whump, but I liked how his arc ended in the series. I've read the series twice, now, and I appreciate how the Wraith aren't just vilified and their culture is explored with some interesting worldbuilding and a move towards a non-genocidal eventual detente in Pegasus between Wraith and humanity.