- Common law vs Civil law... reliance more on legal precedent than on codified laws makes the legal field unnecessarily complex. If common-law defenses or other considerations are not included in the plain text of codified laws, the codified laws need to be fixed.
- Adversarial system vs inquisitional system. These need not be disjoint. Some sort of hybrid where the judge (and jury) can ask pointed questions of witnesses, or ask for elaboration on some point a lawyer is making, seems prudent. That's not to say the adversarial system is entirely bad. The notion, at least in civil cases, and for the defense in criminal cases, that the parties need their own dedicated advocate, is certainly valuable.
- Too many laws. The externalities of creating more and more laws seem lost on legislators (figuratively speaking; not truly lost, but ignored, since it ensures job security for lawyers).
- Reform of the incentives for prosecutors. The objective should not be to win cases, but to serve the public interest. Criminal prosecutions should not really have dedicated advocates intent on trying to convict the defendant, but that's what prosecutors in the United States usually are. Rating prosecutors by conviction rates is absurd unless you've already decided that every defendant is guilty.