Which information do you want to display?
Size (with/without various links), count (regular file/folder count, then e.g., hardlink count if >1)
What makes you say the Evaluator is too simple/buggy?
The bugs I've encountered Evaluator column data disappears on refresh
Or the various limitations that make converting a script of a few hundred lines too painful and without a certainty that it's even possible Evaluator columns issues/questions
Have you tried a script column? They work fine for most things.
Yes, I mention its poor performance in the post?