I haven't had a chance to check out Remix yet, but I've certainly been impressed with the creators' (Ryan Florence and Michael Jackson) work on React Router and their React Training series. They design very good, easy to learn, low surface area APIs. I suspect Remix will be more of the same.

Regarding frameworks in general, the common lament is that it's all churn with no progress. In my experience this certainly hasn't been the case. It was much easier to work with jQuery than with the old web APIs, and it's light years easier to work with React than with jQuery or some of the older frameworks like Backbone and Ember. Each step built upon the previous one and unlocked a completely new set of capabilities.