Please give us an onscreen readout for the measure, in degrees, of the angle formed between our ship, our target, and the center of the SOI we share. Eyeballing it isnt a challenge, it's a nightmare and a lack of a simple tool. Same goes for angle of ascent/descent readouts. They're currently very finicky in the way they appear on our orbit lines. There should always be an angle of ascent or descent marked on the orbit line if you have a target selected and it's inclination differs from your orbit's at all.
Please, for suggestions use the suggestion section of the website, not bug reports.