Yes but still ranks and mcmmo will be reset; for players with over 5k mcmmo (there is pretty much players Who got that) won't be so Happy of seeing their mcmmo reset.
Even if we reset prison it will still lag due to all the plugins and the size of the map cuz everyone loads all the chunk in the flatland and theres no map limit in the nether & the flatland which cause the server to lag. But yeah I do believe prison needs to be reset due to all the glitch it has but personaly I doubt it will since gwism made the two last prison server & gwism is not admin anymore.
I think that if we reset prison we'd make it in free world not flat, but have a larger free world border. Also, most of e reason prison is laggy is because of old and outdated plugs like mcmmo and heavy red stone usage.