So I'm assuming you clicked into here because you were bored.
Some suggestions for ArchMC(It is 26 August, some things may be patched by the time you see this post)
Duels:
Adding an FFA Arena or Crystal PVP arena would be good as it would be a great way to let players from Lifesteal and Survival to practice
Creating a new lobby where all duels are made to use 1.20 pvp would greatly help Survival players in pvp (/lobby join 1.20 or /lobby join 1.8)
Adding more gamemodes(There are some extra gamemodes on Zentic) would increase popularity
Fixing gamemodes with multiple rounds would help (Currently in bridges matches, it ends with an error message)
Adding an autojoin feature would help promote lesser known gamemodes
I understand that a majority of these features are from Zentic, which I think would help make Arch more popular. Currently, the players on Zentic are comprised of mostly people who want to play specific gamemodes. Using these suggestions could help attract more players. It could be very beneficial for more moderators to be hired as there have been a small but growing amount of hackers.
idk what to say about this
It could also be good to introduce bot duels