That appears to be typical mid-boom sheeting arrangement. The mainsheet controls the sail's leech tension, the traveler controls the angle of attack (boom's position). As the boom extends outboard, past the range of the traveler..that device becomes ineffective and the mainsheet will assume the angle of attack role, while the VANG takes over leech tension. Sorry for the tutorial, just reviewing everything's purpose. So...... if you want to change things around...it's your boat and your body...just remember what needs to be accomplished by the control tools you have available.
To create a more efficient environment, first remove the clutter on deck. Then makes sure all lines can run smoothly through their respective blocks. As boats age the running rigging often gets swollen from exposure to the elements. Rather than drilling new holes to relocate hardware, simply refreshing your running rigging will suffice. New cordage, maybe even smaller diameter (but higher quality) helps tremendously. Old blocks can be washed with soap and water.... and replacing the out of date, crusty gear can also solve performance issues. Good luck. Have fun.