This is probably not the time or place for this, but if the .jar file icon looks ugly to you, I made an .icns file. I'm not sure how to permanently set it to your launcher's icon, but here is a method to make it so at least until the next launcher update. Hope it helps with the whole "improving the experience" bit.
MAC (which i'm on, and from research I believe is the only one with this inconvenience):
- Go into the icns file (included) and hit "command + A" (it's high res, the mac should auto adjust)
- Command + C
- Right click the launcher jar and select "get info"
- Click on the icon in the upper left, afterwards it should be highlighted blue.
- Command + V
Presto chango! The included file should contain multiple different resolutions, but the highest resolution image should auto adjust to a smaller size if necessary. If you somehow need an even higher res picture, I've included the original PNG as well.
TechnicIcon
TechnicIcon_MaxRes