I suggest the following auto comments for low quality answers that are still worth keeping:
###High Rep Low Quality:
Statement
As a highly valued Super User, I suggest you revisit this answer and add more detail.
Code:
###High Rep Low Quality
As a highly valued Super User, I suggest you revisit this answer and [add more detail](https://meta.superuser.com/questions/5177/what-do-we-do-with-low-quality-answers-from-high-rep-users).
###Low Rep Low Quality:
Statement
Welcome to Super User! I suggest you add more detail to this question so that it can be more useful to future users. For example you could .
Code:
###Low Rep Low Quality
Welcome to Super User! I suggest you [add more detail](https://meta.superuser.com/questions/5177/what-do-we-do-with-low-quality-answers-from-high-rep-users) to this question so that it can be more useful to future users. For example you could <MaterialForImprovement>.