I've been using Frinika for a while, but I have a few things I'd like to say. I have a small, widescreen laptop monitor. In order to edit music properly without excessive scrolling in the piano roll, I need to zoom out vertically and maximize the piano roll. A few things annoy me about this:
1) The default zoom level on the piano roll is way too big to do anything with, as I can barely fit an octave on my screen in the initial layout of the panes. Meanwhile, the zoom level just smaller than the default is impractically small to work with notes. I would like to see an intermediate step.
2) When I maximize the piano roll, the tab strip at the bottom becomes hidden. In order to switch to, say, the tracker, I need to unmaximize the piano roll, click the tracker, and maximize that pane again. Maybe it would be a good idea to maximize the frame that the piano roll, tracker, etc. are in, not each particular panel. I'm not married to this idea; I realize that there may be unreconcilable technicalities which render this idea impossible to implement.
3) Though the tracker LOOKS like a spreadsheet, it hardly operates like one. Try, for instance, to go down a list of notes and change all their velocities from 100 to 75. If this was Microsoft Excel or OpenOffice.org, I would copy-and-paste each value, or I could simply click on a cell and begin to type. Instead, I must manually delete the digits in a cell before I begin to type the new value. It's time-consuming and frustrating.
4) I experience a similar phenomenon in the time signature list.
5) Editing existing notes' velocities in the piano roll is time-consuming as well. I cannot select multiple notes and set their velocities all at once; the combo box above changes only the first note's velocity.
6) Since I use a laptop (and hate using touchpads), I value being able to switch tools using in GIMP or Inkscape using the keyboard. However, the piano roll and measure editor are both missing keyboard shorcuts for their tools. I'd like to be able to press S for select, P for pencil (or D for draw, since D is on the left side of the keyboard), E for eraser, etc.