I guess this is a combination of a suggestion and a question, maybe even a bug report. I have been struggling for ages to shoot the magical arrows that I pick up e.g. acid arrows.
Initially I struggled to use them for a normal shot, then realised that they work similar to bombs/acid flasks. Then I tried to use one while doing range sneak attack, but it did not seem to be possible.
Maybe more tool tips to explain bombs/arrows/throwable items might be useful? I saw that there is a tooltip for throwing, but one for arrows might also be useful.