
The new weapons don't fit Nexuiz. This is the overwhelming consensus among the people that I have heard talking about the new weapons. It wasn't really much of an issue when the new weapons first appeared after 2.5, because existing maps didn't have the new weapons and most servers didn't use them, so players didn't really notice them. But it's now an issue that gets brought up a lot more as mappers are starting to place the newer weapons on new maps. Server admins have to go through a number of steps to try to balance out the new maps to have them use the traditional weapons.
Regarding Nexuiz Style... I've been told that Nexuiz started out as an industrial style game (similar to quake) but then the focus of style has changed to a futuristic space style game. With this style in mind...
Among the traditional weapons (from before 2.5), the laser, electro, crylink and nex seem to fit in with the Nexuiz style. However, the shotgun, machine gun, grenade launcher and rocket launcher are old military style weapons. If the Alientrap wanted to adjust the weapons between Nexuiz versions, they could perhaps change the existing weapons so they fit more of the style of nexuiz. The weapons could have the same gameplay features, but (for example) the rocket would be a more futuristic projectile weapon, instead of a using a rocket designed in the 1950s.
Of the new weapons, the HLAC is the only one that seems to fit Nexuiz. However, it is too powerful right now. The HLAC really should just have the power reduced and then just replace the machinegun (since it is basically a laser-based machinegun anyway).
The rifle and the fireball are just bad ideas for Nexuiz. Maybe they fit in another game, but they don't fit in Nexuiz. Any weapon that takes zero skill to use is bad (like the fireball). The rifle is not only an old style weapon, but it is very difficult to use effectively. My understanding is that it is not a hitscan weapon, but a very fast projectile weapon.
Many feel that the nex gun is the most dominant weapon in the game. The only things that balance the dominance of the nex are 1) map design (enclosed maps with smaller spaces) 2) limited availability of ammo 3) limited accessibility of the nex. I've never been happy that the nex is such a dominant weapon, but I also feel that the nex is absolutely necessary to help balance against the super fast speed of players in nexuiz (especially in CTF). Once someone gets moving fast enough, the nex becomes the only weapon that is really effective in stopping them. Sometimes, even the nex can't stop a super fast player.
There are a lot of options for the direction Nexuiz can take with adding new weapons, or adjusting existing ones.
1) I think there should be at least another nex-like weapon (I guess that is what the rifle was intended to be)
2) I think a melee weapon could work well, if it is thought out properly and tested.
3) I have always liked the hand grenade as a weapon (from quake).
There are a lot of other ideas to consider, but these things really should involve a LOT of OPEN discussion and TESTING of gameplay. That didn't happen with the new weapons after 2.5. So far, it is pretty clear that the new weapons have all failed with gameplay (on any matches that I've seen involving new weapons).
Sorry for being long-winded.
.... some related comments....
Mappers are also putting the grappling hook on maps too, which is just horrible. I say let the server admins decide if the map is to be played with a grapple hook or not, as that (putting a grapple ON the map as a spawn item) dramatically changes the game. On non-hook servers, anyone who grabs the grapple hook will have a tremendous movement advantage that throws off the whole match. Movement tools, like the hook, should be for hook servers where everyone has a hook.
Also (this is somewhat related to the above comment about hooks) please, mappers, don't remove the laser using mapinfo (re: campgrounds/francinator). That actually changes the game mode quite a bit. When you are messing around with basic things like the weapons that are available when a player spawns, that is changing the game mode. There is nothing wrong with playing with the game mode, but let the server admins do that. If you want to create a new game mode that doesn't use a laser, talk to the alientrap devs about making a new one and then design your map for that.