Each and every suggestion is a sane and much needed improvement.
Every checkbox, dropdown and mandatory field they add makes GitHub Issues less attractive to those who don't need it. Simplicity is a feature, and it's one that you sacrifice as you make your software more flexible.
Google Code had stars in order to encourage people to +1 something without creating noise and then instead of +1 comments you got +1 comments AND people yelling at them for using it wrong.