Provide some persistent settings for data summarisation + visualisations

I use PowerBi desktop as a quick analytics/visualisation tool for small sets of data I export to csv files as the need arises. It is intensely frustrating that every time I load a new data set PowerBI decides to auto-summarise some of the columns in my spreadsheet and I have to take a trip to the modelling page to reverse this 'helpful' step.

Also annoying that I have to keep importing the same visualisations time after time. I understand the idea that visualisations are part of a report but I am only interested in analytics and don't want to have to spend 5 minutes for each session re-importing pbvis files.

Finally, _please_ provide an option to stop defaulting to "Date Heirarchy" for DateTimes. I am not a business user, I have no interest in business quarters. I am only interested in dates as a measure of time.