Imagine actual felons who want to change may aspire to be this guy: Judge Mathis
"As a young man, Greg Mathis was involved with gangs, dropped out of school, spent time behind bars. Growing up as a gang member and heroin dealer in the mean streets of Detroit, Michigan, Mathis had done plenty of time in juvenile detention centers before age 17. All this changed when a judge gave him an ultimatum of: either get a G.E.D. or go to jail. At the same time, Mathis found out his mother was dying of cancer. Rushing to her side, he promised her he'd turn his life around and so did: he attended college; passed the bar and earned a law degree; became the youngest judge in Michigan’s history and then served as a Superior Court Judge for Michigan’s 36th District."
People who are legitimate felons that have harmed people should not bask in the benefits of civil liberties such as voting (unless there is some controlled stipulation of proving their worth) but those who have made poor choices in their lives I personally see no reason why they shouldn't vote. I think Judge Gregory Mathis has proven that with some guidance your typical criminal can change.