I've been thinking about the spawns too and I actually miss the spawn grenades in KZ2. As some have already pointed out, although flawed, the spawn grenades make KZ2 games much more dynamic and gave the tacticians a very important role that affects the flow of the game.
I think a spawn-on-tactician type of system may work. It's similar to the old spawn-on-squad-leader system in KZ2. However, the difference is it's an skill that requires activation just like the recon ability. Once activated, it lasts for a short period of time (say 30 secs) and other players can freely spawn on the tactician. Expiration of time or death of the tactician himself terminate the spawn effect and there a reasonable CD time before the tactician can use it again (say 60 secs). A max of 2 spawn abilities can be activated at any given time for a team. This way, clusterfucks are less likely to happen because if a tactician is in a hot area, he's probably killed pretty fast, preventing more players from spawning at this hot spot.
I think this system will make the tacticians more useful and the game more dynamic; at the same time, force the tacticians to be more careful about the timing and their positions when using this ability. Also, "bad" tacticians will affect the team less since their death will void their ability. Give the tactician 10 points for every successful friendly respawn for a job well done.
To further discourage people from using this ability randomly, they can even make the tactician flash their positions on enemy map from time to time (say every 10 sec, they show up on enemy radar for 2 sec) when they activate their spawn ability, unless they are covered by a nearby friendly marksman's scramble+/++ ability. This will not only discourage people from using the ability lightly (they will just make themselves easy targets), but also give the marksmen a more important role in finishing objectives. Now the marksmen are not very useful for their team and they tend to just sit back and camp. Currently in Chinese KZ3 communities, we call a marksman "crouching pussy" for a reason.