@tessus, yes, I tried to keep it to the simplest question for now, reasoning as follows:

setting to switch it off / adjust

My thought was that a particular user will either want it or not. I couldn't think of a use case where one will want to toggle it on and off regularly, so I omitted this from the poll.

If, as a group, opinion is divided, then a setting to enable or disable would be the best solution to keep everyone happy.

size of toolbar buttons

I would like to discuss this too, but thought it was best to treat it as a separate question.

size of the title

Size, format. There are many choices, so left it as a yes/no question for now. Of note, no one has yet commented here that the size in the image is too large. If there is mixed support, allowing the user to configure may be the best answer.

I'll see if I can update the poll with a second question without losing the progress.