I don't know if I'd call the current measures divisive, except perhaps in the sense of being open to the inference that the Government views long-term unemployed as mostly scroungers trying to milk the system and who therefore deserve tough measures. That can create a "them and us" situation which isn't really helpful. But that division's been created already by the media, TV shows such as Benefits Street and so on.
If anything, the problem is that the measures aren't divisive enough. All those on Unemployment benefits are being treated equally, regardless of the circumstances that led them to where they are. Undoubtedly some, and far too many, people on Unemployment benefits are playing the system in some way or other (it is certainly possible). And such people should be discouraged as far as possible from cheating the system, and measures like this might help doing that. Far harder to fake your way through months and months of unemployment if the signing-on process is daily rather than weekly/ fortnightly.
On the other hand, just as many, if not more, of those on long-term unemployment have got there not for want of trying to get a job but through no fault of their own. Specialist skills, perhaps, which don't translate elsewhere. Or lack of experience, in a market where "entry-level" jobs seem paradoxically to require months or years of prior experience. Such people are, nevertheless, being lumped in with the first group in this scheme, despite the fact that they ought to be treated differently. Instead of the threat of sanctions, the promise of relevant courses, and so on. Such courses are provided already but ought to be pushed even further forward. I don't see that voluntary work or bust is the help such people need.
This idea of treating everyone the same regardless of circumstances is at the heart of the government's attempts to reform the system -- but it's a false goal, because circumstances matter. How you got there is just as much a part of the story as where you are now, and the system is being changed to forget this. That, in the long run, is a reform that is doomed to fail.