Ok So I came across this article in which the progressive muslim author argues that it is possible to interpret 4:34 in a way so that it doesn't allow any beating whether heavy or light.
The verse
Men are in charge of women by [right of] what Allah has given one over the other and what they spend [for maintenance] from their wealth. So righteous women are devoutly obedient, guarding in [the husband's] absence what Allah would have them guard. But those [wives] from whom you fear arrogance - [first] advise them; [then if they persist], forsake them in bed; and [finally], strike them. But if they obey you [once more], seek no means against them. Indeed, Allah is ever Exalted and Grand.
An excerpt from the article
http://www.theglobeandmail.com/globe-debate/its-muslims-who-give-voice-to-verse/article17684163/ Many Islamic scholars have quietly been offering compelling non-violent and non-hierarchical interpretations of 4:34 for years. One alternate reading posits that if a couple experiences marital troubles, they should first discuss the matter reasonably. If that does not resolve the problem, the couple should experiment with a trial separation. If that fails, the couple ought to separate, but if it works, then they should have makeup sex.