I must say i like Vulcan! and Death's Angel i know they were Mary sue but still... like them as for the Phoenix novels i must have just ignored the K/S ship stuff as i do when ever i come across it as i just can not see those two in that way. But i like all star trek books i have only found one book i could not get thro from trek and that was from pocket books and i have most of the bantam novels as they were on sale here some years ago for $5 each so i say read the start of them if you like keep going if not stop
It is an interesting idea. I don't think it holds-up in view of the timeline involved, though. The Enterprise Incident occurs in 2269, and TWoK circa 2285. this makes Saavik 16 years old at best. A bit young to be graduating from Starfleet Academy, I think. Also it treads too dangerously close to the "small universe syndrome" for my tastes, where everyone and everything have to be related and/or connected.
And of course since Saavik evidently "helped" the regenerating Spock through pon farr in TSFS, it would be incredibly creepy and incestuous if she were his daughter. So I really, really don't think the filmmakers had anything remotely like that in mind.