I'm under the impression that the numbers for support for removal will increase the further along we're in to the impeachment process. You know, depending on what new information comes to light.
The way the questions in the poll are structured definitely look a lot better than the summaries let on. When given the choice to impeach, investigate, or not impeach, 24 go impeach, 31 go investigate, and 39 go for letting him finish his term. 6 don't know.
When it's moved to 'based on what you know NOW, impeach or not?', if we assume the 24 for impeachment, 39 against, and 6 shrugs don't change their opinion between questions, we can tell where the 31 for investigation go--10 of those break to letting him finish his term, 19 go for impeachment, and 2 go off to not sure.
It's not a done deal yet, but people overall want an investigation and the people who want an investigation tilt towards impeachment. As long as news cycle fatigue doesn't set in, this number only gets worse for Trump from here, and completely justifies the inquiry's existence.