Hi John,
#1 already merged in for the next release :)
#2 & #3 thanks for the suggestions!
#4 as it is right now you actually get less than the desired standard of 20 rows on screen with big blocks. There may be a happy medium in the future (edit: misspoke a bit as we always have 18 lines but were discussing possibly increasing that)
PS I can't believe this was your first comment on itch, welcome!