Many of these AA's wouldn't work. You have some good ideas, but they need refining, some more than others. As I see it, here are potential problems.
Lone wolf- sniper or any power weapon could kill at least 2 people during that time and reload. Auto aim of this sort would be horrible, the equivalent of pulling the trigger and automatically killing others without aiming. Game breaking.
Saboteur- would actually work well, but useless in a FFA match. AAs need to be useful in all regular matches. Feasible
titan- could work, but would really be game breaking to vehicles and others. It would really only benefit campers and snipers. Possible, but would need to redefined greatly and tested a lot.
technician- switching weapons would really screw people up. The point of AAs is to give you a benefit or trick your enemies, not make them change. They need to be able to decide how to react to your actions. Not feasible under current situations.
Scout- interesting idea, but is similar to the tracking ability already. Feasible, but would need to be refined so an automatic weapon doesn't reveal an entire team and other issues.
architect- would work for objective games well, but would pretty much be a free ordinance every time you spawn. More ordinance is fine for some games, but this would lead to camping with shotguns and people being able to put a sniper in their favorite perch that no one else can touch. The majority of who wins a game is based on how well you use your regular weapons and how ell you can use the limited power weapons. Possible with changes.
harbinger- there would have to be a extra delay in spawning, plus it would interrupt game flow. Remember tactical insertion in MW2? It was really only fair because an enemy could see it, destroy it, or spawn kill you. Plus you had to take the time to put it there in the first place and try to hide it well. Part of the game is learning from your mistakes and learning better ways to approach and fight people. This only rewards the idea of repeating something and expecting different results. Also, imagine a camper or a sniper. After you finally get them, they just instant spawn and kill you. Would work for tactical insertion like ability, but would have to add time to respawns, not allowing instant spawning.