Many games have lobbies where only new players can join if they are under a specific rank or level. This could be good to prevent new players from getting stomped by more experienced players trying to farm stats/XP

The game currently appears to be using the default Unity Sound Engine, which has limited to no proper 3D Audio support. Often this means that you can hear sounds that actually happen above/below you as if they were in the same room, or hear people through walls as if the wall doesn't exist.

An alternative to this would be Steam Audio / Phono, which has drastically improved Spatial/3D Audio support. For example, Steam Audio can correctly occlude and reflect sounds so that it sounds as if the gunshot came from the hall connecting two rooms, instead of appearing as if

Make a gesture to shut up your teammates nearby if they're talking. Like fingers to the lips.

 Because it's annoying when you sneaking in vents and your mate starts to talk and giving out location. :/

Something that says using 3rd party communication like discord and teamspeak are discouraged and make the game less fun. A lot of new players dont realize this cause there isnt really a way to know when you start.

I don't think the SMG should have 60 reserve ammo. Seems like a lot and I can just spam the entire enemy team and still have ammo to spare. It discourages from arresting and from using the pistols. Maybe decrease the magazine capacity? Nerfing this would also allow for another weapon to fill the gap left. Maybe theres ammo across the maps you can pick up. 

Also an ammo rework where if you reload and drop the mag you lose the bullets in that magazine.

Whenever you are in a room and an intruder into another room it could be nice if you could muffle the sound depending on how wide is the wall or like how large is the room

And no not like r6(where you can destroy walls and etc) but the details on the destruction of an object like in control

Just like your lockpick, it could be cool to inspect the gadgets and also the guns.

an option to  kick the door open instead of lockpicking it but it will create a ton of noise giving away your location ,broken doors will be harder to open and close but they will give the advantage of faster entry in a room where otherwise you would have to waste time lockpicking 

We need this gesture

a system in place to punish vote kick evasion. When a votekick is in motion, people leave before the vote passes, and are therefore able to rejoin once again without repercussion. There needs to be a punishment for people who do this repeatedly to avoid votekicks.

Item would be a pick up such as the riot shield and sniper rifle. Would allow the user to climb on walls and ceilings. Because they are only gloves you can only go straight up or down, no going sideways.

Intruder gadget that allows Intruders to cut the wires of cameras so that they wont transmit video feed allowing them to move freely in front of the camera without the guards being able to see them

Like, being able to pick up the sniper from an dead enemy or picking up the silenced pistol from an intruder.

It shoud be limited tho, if you were able to pick up a walkie talkie from the enemy team for example, the game would be too unbalanced.

Add a Megaphone so players can talk from further away to the enemy team

And the opposing teams can listen to the conversation of the enemies and even communicate with them and trick them. I feel like this would be a cool feature. Or there could be this server room that the intruders can interact with and hack into the enemy comms and hear what they say. To make it less overpowered the intruders will have to find a code that is randomly placed in different locations.

Much like the title screen, based on which team won a different song would play (maybe even a slight variation based on briefcase/hack win). Unlockable music packs change the main menu music and the fanfares for the user with the pack (not for other players).

It would be very fun to have a contest where a skin template for the Panther and Shrike are given to contestants, and each contestant can submit one or multiple skins that could potentially be added to the game in the form of a Steam item.  A limited amount of weapon skins would be chosen in the end, but this event would really help to introduce even more community creativity for Intruder!

I think instead of a lockpick the guards should have keys to unlock the doors that are locked at the start of the round, it just makes more sense. I also think they should be able to re-lock doors, but only the doors that were locked at the beginning of the round so that guards can't just go around locking every door in the building

Guard gadget. Once placed, player can swap to it like bloon cam. Boombox has forward facing camera+area mic and two functions: left click plays loud sound - so if you spot someone you can let your team know there's someone near the boombox (+new options for audio customisation); right click projects your mic input through the speakers, so you can feed false info/taunt righteously/MC over some phat beatz. Can be turned off by others. If shot, goes boom.

Idea for sounds it can play - short musical loops with siren/alarm sounds. Example, boombap beat with a police siren over it.