Q1 "Add CoolReader, without severe battery drain!"
The latest CoolReader is always good to have. However, since CoolReader is an application, it has nothing to do with battery drain in keylock mode. Battery drain is an operating system issue where the OS is not putting the system to sleep when no keypresses are being processed.
Q2 "Latest version of FB2"
What does a file format have to do with a firmware upgrade? A MUCH BETTER selection would be a upgrade of ADE to where it could at least approach CoolReader in features.
Q3 "IF possible, keep Visible Clock Set when device off"
That is not possible, since that would require a hardware change, not a firmware change.
Q4 "LIT is still not right, can you please get LIT to work"
Or just drop it all together.
Q5 "Add Dictionary Support!"
Already there for formats that CoolReader supports.