4.34 is not addressed to husbands but to the community of believers. It is hardly to be taken that the community of believers be told to "beat" a woman just like that.
Also, it speakes not about husbands and wives but about men and women, nothing to do with husbands.
It also does not say that any woman (not wife) has doen anything wrong but that the community of believers FEARS that "they" the women, whoever they are, might to something wrong, but up till then nobody has done anything wrong, so nobody can be "beaten" for something that has not even hapenned.
Teh "idribuhunna" word has certainly avery different meaning from beat, it means as can be logically deducted to do something practical to avoid those women to do something that would be bad for them and the community. Let us not forget that this aya is part of a whole set of ayas that deal with social questions and it also deals with social questions. It is incumbent on the community as a whole thatit takes care fo the women, just as it is incumbent on the whole male population to take care of women in general. This is the question in the aya, that women are looked after, not that women should be punished for whatever imaginary doings might come to mind.
So it should something on the line of: finding out from the women themselves, let them know the consequences that their prospected actions might have, let them think about the whole thing by themselves and when some solution is found for the situation of the women, carry it out with them.
Salaam