Add Additional Number Format Options

It would be great to have a few additional number formatting options. For dates for instance it would be useful to have DD MMM YY or various other combos of this. Also, I have been building cards to highlight variance. It would be great if there were number formatting options to include + as well as - values for numbers. For instance, I may want to show +£250 rather than just £250. Combined with conditional formatting this would make changes clear at a quick glance (e.g. a red +£250 would be an increase on something we want to go down). I know you can format numbers using FORMAT () and custom number formatting, however, when I do this multi card visuals recognise these numbers as card titles