Two wrongs dont make a right on that one imo the standard should be raised on both sides of the equation and equally if one side is going to get buffed the other side needs something too. Like I had suggested, adding the ability for faction leadership to reign in who can access what would be huge. Faction leaders also already do have access to many tools needed to prevent the building of these cases like using middlemen (see Vinny Lucchese using Vincent Lucchese as the legal front man for his faction, that is exemplary work since Vincent doesn't do crimes but is still active) and keeping operational separation from himself and the lower rung doing crimes. Much qualms as I have with Lucchese as a faction, they are an example of good opsec. Of course there may be people in the factioon that break the opsec by bank sharing or using banks at all for storage but like individual catches are nowhere even remotely close enough to fully build a RICO case. These cases need you to do a long line of serious fuckups and not policing information (yapping to the lower people about sensitive shit).
TL;DR there is SO MUCH you can do to prevent these crimes from working out. They only work out when you get really sloppy. If one lower level person is able to cause a significant enough level of damage to build this kind of case, you might need to look back at all the places leadership went wrong.
Yeah I can imagine though that was a time in diverge I'm not so quick to want to return to. Keeping RICO exclusive to a very small group, having a very high bar as far as what you need to accomplish to make it work, and even maybe a requirement for UA approval before using the mechanisms could balance out those concerns. UA gets involved even in detective operations fairly often from what I've gathered and experienced. I wouldn't personally mind them being involved in when the lever is allowed to be pulled. Mind, even them granting the okay to go through with the execution does not automatically win the case either it still needs to go to court AND be proven beyond a reasonable doubt. With all the above in mind, I think we might be able to craft a new system with accountability and safety measures put in place to prevent abuse.