Organizing skillbars
The regular weapon skills have been plan and thought til even after release of the . (Take the Guardians asan example there).
Your utility skills already offer what you are requesting and is what Anet allows us to work with and use what fits best for us and/or the situation
Warriors are those who choose to stand between their enemy and all that he loves or hold sacred
While moving the weapon slots may not be possible, nothing is stopping you from rebinding the keys. You only need to see the skill icons for their cooldowns. Not being able to move slots is only a problem is you actually click on each skill to use or run on the default 1,2,3,4,5 keybinds. My skill keys are bound to what is comfortable to me. 1=1, 2=Q, 3=E, 4=R, 5=2