The big difference with Tales (and Coriolis) is that you only use one pool of d6s. Here (as in MYZ) there are 3 pools (base, skill, gear). This does add to the complexity, though as we've said, it's easy to grasp once you've played one or two sessions.
Also, I'd recommend Coriolis over Tales, since that game has regular trauma, weapon damage stats and full combat rules, something Tales lacks.
I wasn’t seriously recommending using TftL to play in the
Forbidden Lands, but you are right, the published games represent a scale of complexity from Loop, through Coriolis and MY0 to Lands. These are all horses for courses though. The player-facing deathless version in Loop is perfect for 80’s kid mysteries, the Darkness Point mechanic vital to the spiritual SF of Coriolis, and the degradation of MZ0 seems right (though I must admit, I have never played that). Personally, I think the way
Lands is turning out is exactly the level of complexity I want to pull me back into running Fantasy, which I have eschewed for years. And i’d assure the OP that though it might look complex, it’s really a very elegant system.