You want Turbine to implement a system that you believe will solve a problem that you state, in your own original post, is a rare occurance. Then you ask is there any reason NOT to do this?
Every poster after that point gives you one or more of the following:
* Why it's not a good idea
* How this was abused in the past
* What options are currently available to you to handle these types of issues
You disagree with all the posters and ask:
The answer is no. At least not one that relies on players as the end all be all in deciding what happens. If you want a system where players petition a DM to review the situation and based on text/voice chat/game logs to determine if a player should be removed from the party then that would be a system that would work (assuming the DM was competent to determine motive from the information provided). The problem with that is that such would take far longer then just recalling and reforming and if Turbine was going to put that much resources into such a system I would question why when there are many other better uses for said resources at this time.