I agree, and Peershares doesn't even require you to pay your dividends in peercoin. It's very easy to swap the peercoin dividens to some other bitcoin based currency.
Let's face it, Peershares is hard to maintain. Once you forked the project, you're on your own to keep it up to date and secure. This means that you should be able to handle any issue on your chain yourself. So the level of competence required is equal to forking peercoin directly.
I honestly believe that it is possible to implement more advanced stuff using a stable third party blockchain. A blockchain is just a timestamped immutable database, and it's possible to use third party blockchains like peercoin's to timestamp your own distributed databases. Which should provide you almost the same possibilities as Peershares, without the hassle to maintain your own chain.
The current proposal of PeerAssets is indeed simple and lacks features compared to Peershares. But if we build PeerAssets cleanly, it can become a stable base which can handle more advanced usage.
However, feel free to disagree, this is just my 2 cents. Time will tell ...