I'm curious why you say Clojure has a steep learning curve.
Most programmers grow up with learning OOP and so throwing all of that out and asking you brain to do everything in reverse is challenging. I know having worked with a dozen J2EE developers in their transition to Clojure. It took at least 3 months to just be productive.
Scala for many people is just Java with a sprinkling of functional and they never really bother to learn the internals or the more complex areas like generic programming e.g. Shapeless/Cats.
Personally I think it's less about FP vs OOP -- even if the OO parts of Scala are familiar, you're going to encounter FP code in Scala, and in general there is a lot more to learn with Scala as a language just to be able to read other people's code effectively.