The traveler is one of the most important controls on the boat, it is the only way to control the angle of attack of the main.
The first thing I do on a boat that has pin stop traveler is to upgrade it to a line/block and cam cleat arrangement. Being able to use / adjust simply and easily is the best way to make sure you do adjust as needed.
Travelers let you point higher, reduce weather helm, heel less and - when the main / jib is balanced even steer the boat.
Frankly, there is no way I'd change a end boom sheet to a mid boom. Same reason - more control and less force - not to mention it makes single handing that much more difficult.
Lessons learned are opportunities earned.