You mention welfare being cut, but my understanding is that the planned UBI is opt-in, so existing benefits if they happen to be better for you would be preserved.
#1 is debatable, since we know the VAT will be shifted towards taxing luxury goods. Though I didn't look into the specifics of it.
#2 from a practical standpoint, money clearly can improve the quality of life, especially at the lower income levels. Just being able to compare with neighbors is a luxury. There's a lot of people living paycheck to paycheck where they wouldn't even think of it.
I don't have a problem with #3. The amount we are talking about isn't even enough to be fully dependent on. It's not meant to be that either, it's about moving towards economic freedom, allowing choices that would not otherwise be possible.
RE: Andrew Yang- Freedom Dividend Test: Is Giving All Americans $1,000 a Month a Good Idea?