My suggestion is that in the "Live Data" view panel, that you add columns for the following:
1) Symbol information. This way you can have a column be the name of the symbol, or other information that may be more informative than just the ticker.
2) Time stamps for the last, bid and ask. This is very helpful for making sure the market data is in fact live and there are no disconnects or stale information.
3) Allow the system to publish information for display here. For example, the current value of an indicator like a moving average. This would be extremely helpful because you could then sort by a column that may be an idicator of how close you are to trading a symbol, and this will allow you to focus on the whole list down to the symbols that are most important right now. It would also eliminate the need to open a chart for each symbol to get a "look into" the system.
4) An advanced request would be the option to have the same Treeview in the symbol list to be mirrored in the LiveData panel. So the catagorization, ordering, and organization of the Symbol Lists is carried over which would make it easier to find specific symbols in a large list.