It's possible that it's simply paranoia, but moments where Opus starts acting like Haiku seem to correlate with periods of higher latency and HTTP errors. Don't like reporting this because it's so hand-wavy and conspiratorial, but it's difficult not to think they're internally using extraordinary measures of some sort to manage capacity.

But even when Opus is running healthy, it still doesn't address the underlying issue that these models can only do so much. I have had Opus build out a bunch of apps but I'm still finding my time absorbed as soon as it comes to anything genuinely exceeding "CRUD level difficulty". Ask it to fix a subtle visual alignment issue, make a small change to a completely novel algorithm, or just fix a tiny bug without having to watch for "Oh, this means I should rewrite module <X>" is something that simply isn't possible while still being able to stand over the work.

It's not to say I don't get a massive benefit from these tools, I just think it's possible to be asking too much of them, and that's maybe the real problem to solve.