Limited is the BEST way to do 24. Kinda prevents the whole 24 hours gimmick, but they really NEED to write the whole story down before they start filming, otherwise it becomes a mess, and with 3-4 plots that follow up on each other, but don't flow. Rube-Goldbergian-style.
Season 1 was much tighter than follow-up seasons, and by season 4, the wheels really started to come off on that. Just saying the plot out loud is enough to frustrate you, can't imagine the guy trying to plan THAT attack...
Kidnap the secretary of defense and broadcast his live execution as a diversion to upload a virus that gains computer access to every nuclear power plant in the country which is a diversion to steal a stealth fighter to shoot down Air Force One so you can get the football and launch one nuclear missile at Los Angeles even though melting down every nuclear power plant would've done much more damage in the first place.
The first 13 episodes of season 1 were really tight. The first 10 or so episodes of season 4 were really tight until the nuclear power plant reveal.
This show never had enough plot to fill out 24 episodes, which is how you got all these stupid subplots with family members that do stupid things and bring the storyline to a grinding halt, like the psycho daughter who managed to kill herself even though she was the only patient at the CTU infirmary.