So here's the list of things that were (or at least supposedly) under development at the time when work on this article started (January 20th, 2020).

Make speed FPS independent

The frame rate should not affect the speed. The most vocal thing that is being constantly mentioned on the forums is that there is a big advantage for users with higher FPS. Which basically makes the game "pay to win" for people who have powerful computers. This is because the movement speed, and shooting speed in the game is affected by the current frame-rate.

There are multiple approaches to how other games solved this issue. Some problems can be solved by delta-time variable, but that can break up the physics. The most full-depth solution out there is probably fully-fixed timestep, which can both work in multiplayer and in the case of creating replays.

"Please make the game so everybody can bhop the same with 60 or 1000 FPS" ~u/xSyncShadow, u/Serqio22

Weapon balances

I'll just skip this one. Everyone has its own opinion on how weapons should be balanced and most of those opinions can be harmful to the game as it is. Such as "delete sniper" or "remove shotgun" proposals.

Let's be honest here. This doesn't have a solution. You can't make a great defense when you don't know from which side the next attack will be coming. The anti-cheat will always be going to be trying to catch cheaters after they occur. If you want to know more about this problem, there's an amazing elaborate on it on Github by Inusha (hrt).

Higher Tickrate

Higher Tickrate can help with landing shots and the overall smoothness of the game. This is probably mainly dependent on upgrading the servers. I'm assuming this brings additional costs in the case of servers.

Battle Royale

The first documented mention of Battle Royal dates back to January 2019. It's a very popular game genre and Kruker can benefit from it. ~u/TheJewHunter88

Friend list

This is another very vocal suggestion happening on social media (ex. AdoreMe#5506).

Counterargument: I never used this in games personally, because when your friends start playing a different game, you lose contact with them. Social media are usually more helpful. It kinda feels like reinventing a wheel every time. I don't find it that necessary in today's world, but I could be looking at it from a different perspective as I'm a streamer so I have set up ways how I communicate with people.

Password changing

In the current state, the game has no automatic password change system or forgot password system. It's currently done by sending an email to the Yendis company. I've heard from some people that they haven't got a response for days. Having this automatic also removes the burden from the Krunker team. ~owosync#1049, Jesucristo#0069

Renaming

There's a big demand for renaming ability. Either for in-game currency or for real money. ~u/DepressedLlama777, Madman#3041, KaitoNeo#4721, DaBass#7358

Other

Two classes that have been mentioned, but potentially scrapped during the process of development are Flamethrower or Arsonist, and Shield class (ex. u/NovaAge). Later on, in this article, there are some suggestions to make them more fun.

Next, a very vocal idea is trading 1v1. There is a serious counterargument for this, as it can be used for market manipulation and will be harder to detect than in case of market manipulations with the current state of trading.

Rumors

Multiple rumors are going around. One that I'd like to mention is that they’re trying to get Krunker partnered with Twitch and get Twitch loot boxes or something. They’re also thinking about Krunker being put on Steam. When will it happen, or if it's too early for that, we will see.