The latari/uthuk starter boxes are significantly cheaper than their standalone counterparts, but not as much as the core.
The core has effectively 7 25USD expansions (counting both heroes as one box since they only have 1 model) and 1 35USD box (2 large models even though different faction) and of course the 25USD essentials. Thats 235USD worth of crap for 100USD. The only real difference being lack of certain cards from the standalone boxes, which for Daqan isnt much of an issue (legit, there is no reason to get Spearmen standalones vs just getting more cores) but for Waiqar thats actually a pretty big factor since CI for Archers and Lingering Dead for Reanimates are pretty huge upgrades not found in the core.
Course 25USD of that is wasted in repeat heroes. Having a backup of the Essentials isnt a bad idea so i wouldnt say thats wasted unless you bought more than 2 cores.
Latari is 60USD, and contains roughly 105USD worth of stuff (depending on how you determine the value of the single-model hero and scion). Uthuk is 60USD, and given Siege units cost more and their hero is a Siege unit i'd wager ~115USD worth of stuff (speculation only). Essentials is 25USD, but since its separate you only pay that once.
Both are a bargain compared to their respective standalones (assuming Uthuk wont be the odd man out and have different than 25USD/35USD prices), just not as crazy as the Core. Even if you pawned off the half of the Core you didnt want for 20-30USD, its so much cheaper for raw model count.
Of course, this is a game with an upgrade system so raw unit numbers alone isnt the goal. You can easily get more models than you'd ever use if you bought 3-4 cores right now to get a huge army, then realize you need like 4 of a certain box to get enough cards to field them properly and end up with like 6-10 trays of models you'll never use just because you have so many of them.