What about the imoseyon tweaks?
It seems that many of imoseyon's tweaks are either included or can be added. Under Liberty settings you can enable cron and setups the sysctl settings. Some things that may not be included are the sdcard read_ahead setting, the new possible file system speedup, and his aggressive memory management settings for minfree.
If you download his zip and have some basic shell scripting knowledge you can add these settings that aren't included in /system/etc/init.d. You could even modify his script by removing the pieces that are already included in Liberty.