Pillar Conquest (Working title) Beta

This map was made in a single session so please don't judge it quite yet. It would be helpful to recieve constructive criticism from the PMC community so I can further develop the map. Thank you.
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Gameplay:

Two teams of four to eight people compete to raise the other teams pillar.
In the game you can choose four classes the alchemist, the warrior, the archer and the brute.
Inside the arena there are a number off buffs such as speed, invisibility and damage buffs
To raise the pillars each team has to switch the levers located in the center of the map to its correct color
(red team switch levers to blue and blue to red).
That will raise the pillar and when all four pillars are at its highest they will close the opposing team gate.
In order to start the game both team must pull the ready lever otherwise the pillars wont rise.
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Rules:

At start stand on the gamerules preasure pad to set the gamerules:
-Hard.
-Keep inventory.
-Adventure mode.
-No mobs.

Other Rules:

Do not trade items between classes.
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Things to do:

"beautify" the arena.
-make it seem like its in a real setting.

Add messages to redstone circuitry .

Add a proper lobby.

Make class selection zone a bit bigger.