I would argue that the shared feature set is quite reasonable. You get coroutines, you get Ktor, date/time libraries, kotlinx.serialization. You even get metaprogramming via KSP.

I basically only write expect/actual implementations to talk to platform APIs, but even those, when abstracted correctly behave just like a normal API to users.

You still write the UI layer natively. IMO this is a positive not a negative unless you're working on a product that doesn't care about native UX. And if you REALLY want a shared UI layer, Compose Multiplatform seems to be right around the corner.