In my experience up to pagos, Eureka transfers all the grinding done in the open world to a zone designed for grinding. I havent progessed past pagos because i cant think of anything worse to do with my time. Not to mention losing your mount in pagos seemed like a massive screw you after working to get it back. I want progress. Not regression.

Many people have said the later zones get better but honestly cant be bothered. Baldesions Arsenal or relic weapon is not enough of a carrot for me to endure the torture of pagos.