You can lower the coins in reserve by lowering the number. If you have 6000 coins try putting 5000 in reserve. If the gui is good you can lower more, if not you can up it.
You can also use these switches directly in the debug window/console, instead of having to shut down and restart. So you can start with 9999. Then type reservebalance 5000 in the console and see how it responds.
About your second question, yes that will help. You could use the advanced coin control and send some of the coins to another address. Does not even have to be another wallet. I would send them over in 500 lots, not the entire lot at once. This way you could send some to trade and not loose coins days on the whole 6000.
By using both methods, you can allow some coins to stake, and then after they are mature, send those coins to another address, in larger blocks.
I have uploaded all my current work to github, (
https://github.com/Tranz5/HoboNickels ) version 1.3.8 but I have not compiled a public release yet. This would fix your issue with no intervention needed on your part. Hoping to complete 1.4 here very soon.