'Is our ?self declared? approach, guarantee of no contact with ex-partners and exemption from the upfront charge sufficiently inclusive to ensure that there are no barriers to victims of domestic violence?'
No of course it's not. According to the British Crime Survey (table 2.11, p54) only 39% of DV is reported to the police. OK you have named a lot of other agencies as well as the police but still, DV is a massively under-reported crime. This is from the Women's Aid website:
Domestic violence is still largely a hidden crime: those who have experienced abuse from a partner or ex-partner will often try to keep it from families, friends, or authorities.
<span class="italic">They may be ashamed of what has happened</span>
<span class="italic">They may feel they were to some extent to blame</span>
<span class="italic">They may love their partner and not want him to be criticised or punished for what he did</span>
<span class="italic">They may think it was a one-off event and won?t happen again</span>
<span class="italic">They may be frightened that if they tell anyone about it, their partner will find out and they will be in danger of further and perhaps more severe violence from him.</span>
For all these reasons, and others, victims of abuse are likely to experience repeated attacks before they report the abuse to anyone ? and statistics can only be based on known data. On average, 35 assaults happen before the police are called. (Jaffe 1982)*
What does 'self declared' mean? Are you saying it's OK for affected women to lie and 'declare' that they have reported the DV they have suffered, when actually they have never reported it? What a horrible position to put people in.
How are you going to 'guarantee no contact with ex partners'? 
These changes will lead to a lot of vulnerable women and children being left worse off.
they're open to suggestions on how charging could work, but not on whether it will be introduced.
It's a bit like asking us how the kittens should die, not whether they should be killed. How can I have an opinion on such a dreadful idea?
I don't give many of these out but here, DWP, have a 