Are you upgrading to 6.2.1? Other than a few environment specific issues currently being resolved for the next release,  this release is worth it just alone because of the multi-threaded capability. Here are some more reasons to upgrade to the current version.

Highlights:

• - Dynamic threasholds (baseline)
•    - adaptive theresholds (learn)
     - local or remote management of dynamicthreasholds
     - extension to the situation editor
     - override expressions
• - Green Maps
• - Sub-node agents
• - Script and log Editor
•    configure log file and script response monitoring with visual editor to configure parsing.
  
• - Agent/agentless monitoring
• - Multi-threaded agent deployment
• - CLI Enhancements,
• goal to have all commands from graphical also avalable as CLI
• - Graphing zoom function
• - Security
•  Universal Agent IPv6 Support, SSO with Java WebStart Client, FIPS compliance fror TEP/S
• - Netcool agent deployment
•   update, config changes with TEMS from ITM
• - Improved TPM / TCM integration with ITM
• - Editor for Baroc classes
• - Watchdog for agents
•   monitor the availability of end-points and self-heal if agents is unavailable

Source: Tivoli User Group