Quite right, but as Mindysan33 points out [here][1]
congress is not just made up of congresscritters, but a whole host of people who work behind the scenes to make it happen. Keep other employees the same, and you can carry on that institutional knowledge.
As for as the committee seniority is concerned, once you get rid of the long timers, those committee heads will become a functionary position rather than being just another source of corruption like it is today.
[1]: What is your favorite term limit scheme? - #7 by Mindysan33
