Yeah but people break rules all the time, and rpg mod was made like that in general. Particle's isn't especially easy, it's the AI that makes it easy. And there isn't much we can do about that, maybe if the distance a player can hit with the weapon is reduced enough so that you have to be within bot's hitting range. That doesn't do much about hiding behind the walls, but it does makes some zones like the tden, eoutpost, etc. more difficult.
In the older rpg's from a long while ago, I used to time the swings of some of the characters. Like the Gnolls with the broadswords, so it was slightly more challenging. Though that was before I learned to hug the walls. I think the only characters really worth fighting are the mages since they have more of a 3-dimensional range, but mages hurt themselves with their own magic and hence, become really easy to fight. If you can land one shot in, a cent will take the rest of his life with magic if you can run forward and back (a skill most trpers don't know how to do).
But I doubt too much more will go into development in trpg. The argument soon will be when the servers will go down permanently and when we'll move on. Everyone knows servers aren't free, and why host a server for an aging game?