There's only been one war on this server and it was an amazing experience to have been able to experience that back in March of 2020, as a player. Everything you're mentioning was apart of it, special rules that applied the factions that applied for an F4 war, FM approval, proper RP escalation, DM rule adjustments, and even applications to FM for all faction involved for the war itself to occur. As you're not the first player that has inquired about a war system coming back to criminal roleplay on this server. Myself included I wish they added it back. But from a staff perspective I can see as to why they never wanted to bring it back, the forums got extremely messy and it lead to very quick demotivation from an OOC perspective for players simply trying to have fun. If there was a stigma shift in the regards for not reporting situations when you loose I'd support this, but due to the fact I've seen it first hand and the pages of reports it brought to the community I don't foresee this being brought back (unfortunately).