The issues with EOS will likely not be seen until any of the applications reach massive scale. However, the problems could come right away since no one even knows who’s going to be running the software. I would not be surprised if one of the first major decentralized apps comes on the EOS blockchain, as it seems to be the first platform that will be able to support high usage apps at scale.
Having that said I don’t believe that EOS will be a long-term solution.