helena there's a lot of nasty things in universal credit, when they were applied to current benefits people did campaign but either didn't notice that they were applied to universal credits or thought universal credit wouldn't happen (I know a lot in the second group). It saves a huge amount with its cuts, the government were never going to do away with it.
Another MN myth - housing benefit will continue for social housing or housing associations. It will not. Everyone must apply for local housing allowance, because the low rents are then used in the calculation to keep local housing allowance at the lowest third for all properties, slashing the bill.
Disabled people will be required to do workfare (some areas already do this) and will lose out on disability premiums (about £30 a week). Terminally ill and don't die by the date on the form? You cannot appeal and get it restarted because you are no longer deemed terminally ill.
Oh and that's not forgetting the five week gap for it to start being paid.