Agreed, any professional software engineer would have to agree with that. But still, it is a free project and thus there is that underlying theme that mileage will vary and its team is not accountable of its use (their stance has been if you don't like it, you can always ask for your money back!!should have tested this new feature before releasing it

And like yourself, you're contributing useful code examples on your time that other people have for the most part appreciated. Code with clear explanations, such a rare combination nowadays. I just read this thread, and I am at a loss where these differing perspectives are leading. I would say, "thank you", and deal with its implementation in the variety of ways made possible. My experience with 100s of successful software engineers is that ALL of them end up personalizing inherited code to their liking anyways.
So, I too stumbled across the new paste feature in VICE. I personally think it sucks, not from the well-documented lack of PETSCII support, but it is an annoying feature one can easily invoke without meaning to. There are too many tools (again, well documented) to use outside of VICE that work on the host as intended. Why introduce a buggy paste feature ... as a convenience for what? A code snippet? Get real.
For me, I am finding VICE a little long in the tooth. Between using real hardware with modern storage devices such as uIEC/SD and the progress made in the MESS project ... VICE ends up being a debugging tool for me only. And if that team wanted to do something special, it REALLY needs work in there -- many bugs with a terrible UI. Still, it's the best option I have available, for today at least.