I would like to see sysstat updated to the 5.x series in U3. I have had to do this for serveral of our systems to find softirq bottlenecks on the CPUs and some other info that isnt available in the 4.x series. The main problem is that the log files are not compatible with each other so older /var/log/saXX are not readable by sar. This may be a killer and I could see it being a RHEL4 item instead.