The design fundamentals for Ethereum & Dash are pretty terrible, it's amazing they've survived this long (Dash probably only because there's so little transaction activity to abuse).
Only we let their fundamentals weigh in heavily, others don't, wich pretty much explains why Ethereum managed to grow this large.
I don't see the added value of a coin running on top of another coin. In all cases you are subject to the underlying chain of the coin to work in order for yourself to work. Operating your own blockchain has so much more benefits, and allows you to scale towards you own roadmap, and not have an asshole as Vitalik decide for you when to scale. The proposed Ether scaling 'solutions' aren't convincing either. In all cases the main chain is still swallowing tons of data.
How can't people that smart not figure out that cluttering the main chain is not the way to move forward? It's a guaranteed way to kill off your coin, unless you fully admit that you don't mind centralization and want to continue on that path.