I like the store in general, but I have to admit some of it is unbalanced, and other parts of it are uneccessary.
Wooden platforms, crates, and upgrade stones are currently so common that it's kind of redundant to have them up in the store. At least, that's my perspective as a player on average difficulty and platforming; either could be different for players on harder levels, where death is more common and platforms less so.
Conversely, some things are simply too cheap for what they are. Elemental damage boost enchants are, in my opinion, some of the most vitally important gear in the game, and are available for only 8000 shards. That's about three minutes of grinding in storms.
Conversely, I think find survivor scrolls, wind shelter scrolls, and buoys in the store are both necessary for a fully enjoyable game and fairly priced.