Some cases, such as bankruptcy and patent, are heard only in federal courts...?

Some cases, such as bankruptcy and patent, are heard only in federal courts. Do you think that having exclusive jurisdiction by federal courts in these subject matters is a good idea? Why or why not? Some cases are also only heard in state courts. For example, most family law cases are almost always heard in state court and not federal court. Is this a good idea? Why or why not?Some cases, such as bankruptcy and patent, are heard only in federal courts...?
Patents and bankruptcy are in federal courts because the constitution gave Congress the power to regulate these matters and Congress has done so to the exclusion of the States and State Courts. Some federal laws may be litigated in state courts and any federal court can consider state laws assuming they have ';subject matter jurisdiction'; such as cases over a certain amount between people of different states