I would rather they use the mechanic more (e.g. The iron boots) than give you all rewarding mechanics at the beginning of the game
Eh, I think this approach is more... sensible, for lack of a better word.
There's just something really exciting about getting a new item and figuring out everything you can do with it. Knowing that feeling will be front loaded is kinda disappointing.
Now the fun is figuring out everything you can do with those runes, except now you get to apply it to a huge ass open world instead of a few dungeons and/or monsters.