If you read their strategy for a long release ICO basically, it is to prevent things like pump and dump, and also to allow time for the token to acquire a true value before full market release, not some arbitrary number that instantly plummets. They also want to prevent single entities from trying to control the market shares. I communicate with this team regularly, and I will say that I can see some issues arising with governing powers when it comes to ownership of items, but really, that's what the decentralized smart contract is for....the powers can do little to nothing if the parties all agreed.
Also, to note of why they take only ETH in exchange for LAT.....it keeps a steady and sure price in view as the full release gets close, once again, allowing the token to become properly valued before it hits the markets. It's also based completely around ETH smart contracts, and that is the most versatile crypto that is widespread at this point, makes sense to me. I wouldn't accept your pivx for a startup fund, Ethereum is established, and steady, compared to most every other coin there is.