I think a lot of the issues with later books is that DG decides to separate her main characters for 20yrs. She sets up this wonderful atmosphere of the Scottish Highlands.
Absolutely! Their separation made sense in the context of Culloden and is what makes their story so beautiful in many ways - their loss and reconnection through time and space. But 20 years! that's just insane.
It could have so easily gone like this...
Frank cops out early (either kicks the bucket or decides he cannot do it anymore). Bree, who's maybe, idk, 10? is revealed through some convenient bonkers plotting to be able to time travel. Claire decides to risk it all and take her back through the stones. She arrives when Jamie is still at Aardsmuir, but somehow she manages to visit him and they have a deeply emotional reunion. We all cry buckets. Then - since I'm assuming DG really wants them in America - Jamie gets transported to the colonies and, be still my broken heart, they are separated AGAIN!
End of Book 3.
Claire remains in Scotland where she builds a reputation as a fearsome healer and it's a hard life but thanks to Jennie's love and companionship she makes a good life there for herself, Bree and Fergus (lets not forget Fergus, who's now a strapping lad of about 20, chomping at the bit in the provincial confines of rural scotland. he has the hots for lovely UNRELATED Marsali who's 15 but there's nothing dodgy going on there because he's 20 and not 30 and also they're not stepsiblings
).
After, let's say, 2 years of hard labour where he nonetheless has ample opportunities to demonstrate his superior leadership skills, Jamie gets released early because HELLO JAMMF!!! and Claire, Bree, Fergus and Marsali make a civilised trip to the New World where they do not encounter pirates or mutinies (I would allow a bit of typhoid which Claire saves them all from).
From then on, Fraser's Ridge and pioneering galore. Claire and Jamie have another bairn (whom they name Hope, in honour of Faith and their new beginnings) which is totally realistic because Claire is only 40.
In time, wee Ian joins them of his own free will and we can pick up from there. Bree grows up and doesn't become annoying, she meets a lovely ancestor of Roger MacKenzie and they live happily ever after.
End of Book Four and end of Saga.
Not that I've spent anytime considering this bit of fan fiction, you understand. None at all. 