My 2 Pennys:
There where _too_ many runs where i ended up with like 7-9 str charm and just two or three evo's if even. Heck i couldnt even use all the str charms in many runs. Berrys also feel friggin annyoing. There are enough useful items to spread with RNG, honestly no reason to bring berrys on the table, too. The difference you have while getting a evo stone or useless berry is way too big; Rng had bit too much impact and ended up not beeing entertaining but frustration if you have a few good first rounds, invested already 2 hours to suddenly get fkd by rng. With all the Status spam there was already enough RNG caused by the pkm. (Paralyze, Crits, Confuse)
And for the ladder: I dont think many ppl have that time to play _12_ hours at once, even if i get the idea from kyu that you need to take effort. Thats effort many people simply cant spend, especialy if they have work or kids. that simple. Maybe consider to do something where you dont need to play 12 hours at once. (edit: Even more hours, thats kinda ridicioulus)
However: The items where nice this event. The event itself was, too. It was just too much RNG reliant and impossible for many to participate for the rankings even if they wanted to. Competitio was not about "the best" but instead about "who brings most time".