So, I think what you're saying is that you, or some fine young entrepreneur should offer an arbitration service and try to create a market for it within the bitcoin space? Bitcoin isn't broken and doesn't need fixing. It was capable of arbitration before ethereum was thought of. All it needs is a service provider, and willing, paying customers. So if you believe in it, go out and do it with bitcoin as it is, and make consumer protection better (if you can find the customers).
If you're not talking about service providers being aribiters, then who would be this arbiter? Please answer this question if I've made a mistake in assessing the situation.
EDIT: changed 'private entity' to 'service providers'. There doesn't ever need to be one arbiter, and the arbiters should be market participants subject to competition, not some form of government, as seems to be implied. If that's what you're after, go somewhere else. Go do something with Ethereum, as you're keen to mention.
EDIT Again: After reading your comments above about the arbiter being a merchant, that's fine. Is your main point that wallets should provide for this service? That's fine too. Is this post geared toward merchants? It sounds like it's calling out a problem with bitcoin, when it's actually just calling out a potential service within the market. That service has it's place, but it will likely not get much business soon.