Omnibus, standard drill.
Sorceress of Darshiva:
Like Demon King, Sorceress is a little disjointed - it's very episodic, and the episodes don't have a ton of narrative or thematic flow to them. But on the whole I find them more entertaining than the previous volume, and while it's not quite up to King of the Murgos on my fondness scale, some bits - the Senji sidebar, the injured wolf, the last ridiculously dramatic scene - are personal favorites. I do get a little tired of the insufficiently varied random refugee/seaman/peasant exposition vehicles - Eddings can do about two dialects, neither particularly charming, and he uses them way too often. (Also, the one that's explicitly bad-Western Texas is particularly jarring because it's so specific and familiar - it always jerks me entirely out of the story.) And there's just not a ton of narrative tension, because the story is so prophecy-driven - it's very clear that things will work out precisely how they're supposed to work out, and so no incidental danger is actually a threat.
This is also a good place to rant about Vella. Like Taiba in the first series, she's an attractive woman who's aware and in control of her sexuality. She has a bit more personality than Taiba ever did, but she is still explicitly being groomed to be a "reward" for one of the male characters - there's the instant-obsession factor that's frankly creepy and she has no other goals or desires at all. (Other than wanting to be worth a lot of money when she's sold. Because she's a Nadrak woman, and therefore property, but not a slave, really, it's fine... gah.) Plus, just as a bonus irritation, this volume has a detailed sidebar of her feminization - she can't just be a really hot armed badass, she has to wear dresses instead of leather and realize "there's more to being a woman" than she could possibly have known. Despite, you know, being an at least thirty year old widow. Gah. I like Vella a lot - I have a weakness for leather-clad knife-wielding foul-mouthed badasses - and I really wish she could slice her way out of this story and find one where she's taken seriously.
Seeress of Kell:
As with Enchanter's End Game, I like the climax and the leisurely happy ending a lot, and I am much less excited about all the random filler beforehand. The adventure on Perivor in particular was just egregiously pointless - it might have made a decent stand-alone short story, but there's no tension, no mystery, and a whole lot of wasted time. The Poledra reveal should have been more interesting, but it was set up so there was no tension for the reader, so all of the shocked characters just looked rather thick.
I do like the Malloreon somewhat better than the Belgariad - it's denser and aimed a little more carefully at adult readers. But neither series is shooting for a particularly high bar - the writing is understandable but hardly elegant, the plots transparent, the narrative tension nonexistant, and the characters lovable without being all that deep. (And the surface feminism is badly undercut by the core gender-essentialist sexism that pervades the entire work.) And the Malloreon in particular is plagued by what feels like a fundamental lack of plot - there's just not enough to do to fill five books, so Our Heroes have essentially random adventures while on rails towards the final event.
The fact that this is considered a point of worldbuilding is... unconvincing.
So, short version, these are beloved childhood books for me, and I'd consider giving them to an interested ten-year-old who was excited to read Adult Books, but otherwise, these are firmly Nostalgia Only.