In all seriousness, I dont believe that a religious court should have any status in law.
If people volunteer to be judged by their peers, then so be it, as long as no judgements passed are legally binding, in anyway recognised in law or take the place of the established legal process.
In all seriousness, saying this ignores that a huge number of legal disputes are settled by arbitration and mediation instead of law courts every year. In fact, if there weren’t different bodies willing to facilitate that the courts would collapse under the weight of massively complex e.g. construction, shipping, insurance and family law cases.
Many elements of inheritance and family law are very suited to resolution in this way – many people’s expectations around marriage and family property are informed by religious and cultural expectations and notions of justice, and there’s a very high level of dissatisfaction with court outcomes from users. (Start another CSA thread, see what happens on here!) Why shouldn’t people be allowed to resolve disputes through a forum that is based on those same expectations and notions? And if you don’t want to, you don’t have to – the courts are always there for you.
Jewish courts have been operating in exactly this manner in England for three hundred years-ish without any serious problem, hence the early (and entirely apposite) reference to Beth Din.