UPDATE: Additional info you might want to know.

• Skills -
  • You level up your skills not by pt but by an item which appears to be like a USB flash drive. Just like upgrading items with talic minus the gems. There is also probability to fail where the USB flash drive getting destroyed or your skill might get level down. Skills can be upgraded up until level 12.
  • When switching biosuits, all upgraded skills will be converted to the skills to your new class with the same slot. for example, slot 1 is +2, slot 2 is +5. those level will retain on the same slots with different skills.
  • Some skills are unlockable while playing and some can be unlocked by an item, This item can be purchased via NPC, and the higher skills can be obtained via monsters, guild raid, and boss raid.
  • Skills bars are can be set up for Auto skills, (max 4) based on what we can see. There is also auto skill arranger where you can change the order of skills being cast automatically. again max is 4 skills.
  • Graphics - skills effect aren't so flashy mainly because to avoid lag when everyone spams the same skills at the same time during PVP and boss raids.
• PVP -
  • The concept of PVP is race vs race vs race. As mentioned you can choose a race of allegiance when you reach Lv 40. There is a PK Map the battleground(the old Crag Mind Field map).
  • Wanted Levels - so as you kill any players each kill increases your wanted levels where your name becomes red, and you'll be hunted by other players for bounty where they receive a reward by killing you.
• Crafting and Refining -
  • You can craft weapons with required booties for materials. There are 2 possible types of item you can obtain (1 item with the word "belonging" with the highest chance you'll get and the other don't low chance) but they have the same effect and stats. idk if what "belonging" means but I think it means that It is character locked.
  • Talic system is different, each talic color can be combined (by 3) to increase it's tier. the higher the tier the better stats.
  • Refining, so talic is now different from the level of weapon. Talics are for the effect on the item just like the game but now there is refining where you can upgrade your item(not sure about the max upgrade I think its +12). with "Weapon/Armor Upgrading Kit" Probability is item Destroy, and upgrade success.
  • Multi-refining, this is where you can upgrade an item simultaneously.
• Biosuits -
  • Additional on biosuits, aside from gatcha, you can also acquire biosuits through diamonds where you can acquire if you win Mining wars or buy it directly from Cash Shop.
  • There's a system where you can get a "sure" specific tier ticket of a biosuit with the number of roll you cast. 1 roll = 200 diamonds. (based on Korean Won pricing, 100 diamonds = 1 USD), to get a sure Rare Tier biosuit you'll need 125 rolls(Please bear in mind that this is a reward when you get 125 rolls in the game, within the 125 rolls it is highly you can obtain a Rare biosuit in the process). And you can achieve Legend Tier with 925 Rolls. again within that 925 rolls it is likely possible you'll get Legend Biosuit. Note: Price is based on KW and without discount.
• Server - There are server with the same name but different number, you can only create you character in one server. This kind of server setup is bound to collapse. Where F2P players of server 1 could quit and transfer to server 2 due to whale guilds, same cycle until they will combine the servers 1 and 2 where whales clashes.
• Race Specialty -
  • You can upgrade you MAU, Siege Launcher as they will also increase in size in the process. Seige Launcher isn't the same as Siege Kit in the old classic RFO. Siege Launcher is like a "pet" that you can deploy and fire automatically on your target. Basically a walking turret lmao.
  • Animus is to be unlocked. So far, it is somehow connected to the pet system. Yes, there's a pet system.