Barlines and grace note heights

Hi guys,
First off -- I absolutely love MuseScore. I've introduced to a few friends who needed good composition software, and they also love it. I've been using it for well over a year now to write side drum scores (snare) for a pipe band that I play for. Most pipe band drummers tend to write snare scores on a single line staff (right hand above the line, left hand below the line).

1. Can we add an option to extend the barline length (including the repeat bars) to the width of a five-line staff? While I can read the score with shortened lines (long enough to cover the space one note above and below the line), it gets difficult to see the break between bars and the repeats when they are hidden in a stream of notes -- See attached jpeg.

2. Can the begin repeat barlines be moved flush to the left? Obviously not in the example attached, as there is a time signature and clef sign there, but for say the 9th bar of this tune, I would have a begin repeat marker. However, if I use barlines at the start of each system, the repeat marker appears slightly to the right of it... just looks a bit messy.

3. I would also like to request a feature to mass-select grace notes and extend them to a standard height... Or pre-define the height of a grace note when being entered. The grace notes that I have in that pic are short compared to what would normally be written (at least, the flams in the third and eighth bars are. The grace note in bar 7 is fine.) I know I can double click each one and modify the heights individually, but in a score full of them, that can be time consuming.

Thanks!
Jeff