Are you specifically pointing at a different experience between free + paid? Or just that the free version is unimpressive?
I'm using paid on TypeScript and it's genuinely terrific. Subjectively I think it has the edge over Opus.
I'd be surprised if OpenAI is hamstringing the free version. That would seem crazy from a GTM PoV. If anything the labs seem to throttle the heavy paid users.
Yes, the free version doesn't have access to the same models that the paid does.