Copying the patch notes from the official Discord, for anyone who can't load Steam News links:

🛠️ PATCH 01.000.202 ⚙️

🌎 Overview

This update includes

• Stability fixes

📍 Gameplay

We have updated the stats UI for weapons to take into account any explosive damage done by them. This is to give weapons that do damage with explosive projectiles a more fair representation in the UI. Most notably affected is the PLAS-1 Scorcher.

🔧 Fixes

• Fixed some crashes that occurred when deploying to mission.
• Fixed some crashes that occurred during extraction and right after it.
• Fixed crashes that could occur if the squad deployed a large amount of support weapons.
• Fixed various crashes that could occur during gameplay.
• Fixed a crash that could occur when using heat based weapons.
• Fixed crashes which could occur if a player died while using the jetpack.
• Fixed crash which could occur when large volumes of enemies were present.
• Fixed crash which could occur when the player picked up a snowball.
• Fixed crash which could occur when completing an objective.
• Fixed hang that could occur while navigating the social menu.
• Picking up Medals and Super Credits will no longer lock the player in place.

🧠 Known Issues

These are issues that were either introduced by this patch and are being worked on, or are from a previous version and have not yet been fixed. This list is not exhaustive, and we are continuing to identify issues and create fixes. These are organized by feedback, reports, severity, etc.

• Player cannot navigate to the search results from the Search Bar in the Social Menu.
• Various issues involving friend invites and cross-play:
  • Player name may show up blank on the other player's friend list.
  • Friend Request cannot be accepted when the requesting player changed their username before the request was accepted.
  • Cross-platform friend invites might not show up in the Friend Requests tab.
  • Players cannot unfriend players befriended via friend code.
  • Players cannot unblock players that were not in their Friends list beforehand.
• Damage-over-time effects may only apply when dealt by the host.
• Players may experience delays in Medals and Super Credits payouts.
• Enemies that bleed out do not progress Personal Orders and Eradicate missions.
• Certain weapons like the Sickle cannot shoot through foliage.
• Scopes on some weapons such as the Anti-Materiel Rifle are slightly misaligned.
• Arc weapons sometimes behave inconsistently and sometimes misfire.
• Spear’s targeting is inconsistent, making it hard to lock-on to larger enemies.
• Stratagem beam might attach itself to an enemy but it will deploy to its original location.
• Explosions do not break your limbs (except for when you fly into a rock).
• Area around Automaton Detector Tower makes blue stratagems such as the hellbomb bounce and be repelled when trying to call them down close to the tower.
• Planet liberation reaches 100% at the end of every Defend mission.

Looks like we may soon be getting more things to buy using samples and requisition slips. The Catalog Expansion has no cost, and buying it does nothing. The Upgrade Effect text must be null for Catalog Expansion, that field just shows the effect for whichever upgrade was previously selected.

Edit: It's been acknowledged on the official Discord, looks like it's unintended:

ALERT: ROGUE ITEM DETECTED. The Ministry of Truth has confirmation that a rogue item called the "catalog expansion" is temporarily visible in the Ship Management menu and, in accordance with regulations, we instruct all Helldivers to avoid this rogue item until further notice. The Ministry of Truth cannot confirm the reliability or safety of this item, nor can they confirm its origin.

Quick summary for anyone who can't watch the video, with descriptions taken from the accompanying news post on the Steam store page:

• releases April 11th
• new armors and matching capes
  • CE-07 Demolition Specialist (light)
  • CE-27 Ground Breaker (medium)
  • FS-55 Devastator (heavy)
  • no info on what bonus each set has
• new primary weapons
  • BR-14 Adjudicator (marksman rifle) - "Deliver righteous judgement to your enemies with accuracy. This armour-penetrating assault rifle is best used against smaller groups."
  • CB-9 Exploding Crossbow - "Kaboom! Enjoy powerful exploding bolts that dish out max damage upon direct impact. Gravity must be accounted for when aiming."
  • R-36 Eruptor (explosive) - "Keep your distance… this bolt-action rifle fires jet-assisted shells that explode shrapnel in all di-rections upon impact. All directions. Even your face."
• new grenade and secondary weapon
  • G-123 Thermite grenade - "This little beauty can stick to surfaces before burning up to a toasty 2000°C."
  • GP-31 Grenade Pistol - "Does what it says on the label – a pistol that fires grenades. Don’t forget to reload between shots though."
• new booster
  • Expert Extraction Pilot Booster - "Need to get out of a jam fast? This booster lowers the time it takes for the extraction shuttle to reach the extraction beacon. Home in time for dinner."

Edit: added link to Steam store page news post and summarized info from the same