Inverted corners and half width long slope armor pieces

I keep making gaps in my builds which require shapes that don't exist to fill. The first is when 2 slopes meet at a corner, but the long end of one slope is next to the short edge of the other, requiring a corner which is wider at its shortest part and slimmer at its tallest. This block does not exist, which is a problem both on the 45 degree slopes and the 22.5 degree slopes, as well as corners where both meet. Also, there is no way to have a 2.5m or 1.25m wide long (22.5 degree) slope, so a half width long slope would be useful too. A half width 45 degree slope would be useful too, as currently creating one in 2.5m size requires a lot of blocks, but it's less important than the long slope where it is completely impossible to create a block that fits in a space it would require.

I have attached a couple of images showing the shapes I keep building and getting frustrated I can't finish due to the missing blocks. I think these missing blocks would be beneficial to the game. Also, square base corner blocks would be really good too, but plenty of other people have suggested them already. These specific blocks I haven't found any existing suggestion threads for, so I thought I'd make one.