It sounds like you don't know how to use Element Information, as half of the things you're asking for are available right now.
See the attached screenshot. Each button that you depress displays the associated information.
The angle of a line (or wall) is not given. I agree, this would be extremely useful. I'm voting 'important' just for this one item. 😉
The area of a door or window is not given (the I.S. can give it, or Element Info gives it as the total area of all holes in a wall).
The area of a roof in plan view is not given (only the real area is given). The only value that I can see to a plan view area is for an impervious surface calculation for site planning requirements. It is better to just draw a zone or fill over the entire structure for that, than to add up a bunch of individual 'projected' areas IMHO.
One of the forum moderators • AC 26 USA and earlier • macOS Ventura 13.2.1, iMac Pro 10-Core, Radeon Pro Vega 64