To me the analysis of SWE-Bench is a solid contribution and informative. My guess is that to meet conference's submission bar they had to come up with their own bench (SWE-Bench+), which wasn't thorough enough and the paper got rejected mainly because of that.
Acceptance or rejection at big ML Conferences doesn't seem to carry much signal either way anymore. Completely saturated by grift and poor quality so each paper should be evaluated independent of their Conference status imo.
To me the analysis of SWE-Bench is a solid contribution and informative. My guess is that to meet conference's submission bar they had to come up with their own bench (SWE-Bench+), which wasn't thorough enough and the paper got rejected mainly because of that.