This will be largely the same people who did cheats, mostly scripts for The Feast.

It is often speedhacks by the less experienced users, sometimes just marginal speedboosts of constant 10-15%, so it is not noticeable that much. Then there is a cheat that lets you execute actions and movement while under cc effects. Some very rare cheats are teleports and z-axis hacks or no latency/delay hacks for instant double/triple weaving etc.

If you go into scripting the possibilities are endless, the guys who make them need to at least understand what is important for PvP and it is not always that useful as they claim to be, mostly because they wanna sell you their package and it sells better if they add more to it, lol. They used to make a complete auto-attack bot basically, where you only steer your character. Tactic and strategicwise, it is pretty dumb, but against casuals it must have been good enough. They maybe sometimes attack you while you are not even their target.

You should look out for consistent cc at the same actions, like LB setup or burst setup or when somebodys HP% trigger is below a certain threshold. Likewise they will execute specific skills under those conditions. Especially if you get the feeling that some skill is 'frameperfectly' executed every time, it is a good indication that they are scripting.

It is just much more difficult to notice I think, there are even less buttons to press now, so the chance they are randomly pressing the right stuff is higher as there are less total options to press, and there are even more people to keep track of (4 -> 5). So they are even harder to see in the rng-mess that is happening. It is like SE made a mode where they can worry less about these things, "just lose and rejoin 2min later, you forget about it".

You can't win with anti-bot/cheat systems against them unless SE installs spyware on your PC, it is better to let GM's handle it and make punishments/ban more severe and your game more expensive to buy. They are allowed to permban you without reason, if they want to. But they don't seem to make use of GM's as much as other games would, or they don't have enough tools to deal with it.