Magic spells not being applied outside of combat for mundane solutions.
The Trails series are renowned for their worldbuilding and long running storyline, which irks me all the more that they don't use magitek in inventive ways. In Trails, instead of an industrial revolution, they had the Orbal Revolution. Basically instead of using electricity to power their appliances, they use elemental crystals, called "quartz", which is slotted into their technology, called "Orbments". Now in the Trails series, people can't cast magic innately, but they can use a device called a "Battle Orbment" that effectively lets them cast magic, called "Orbal Arts". This is in lore and repeatedly referenced during the stories of the games.
So why is that they only use orbal arts during battle? Why not use them for mundane purposes? For example, there are seven elements of orbal arts: fire, earth, water, wind, time, space, and mirage. Why not use time arts to speed up production processes? Why not use the time art Chrono Drive to speed up the growth of crops? Why not use water arts to water your crops in the middle of the desert? Why not use earth arts for construction, such as digging trenches or excavating dirt for the foundation of a building? If you can use space arts to banish enemies to another dimension, and can also use that very same art to bring that thing back, why not use space arts for portable storage you can access anywhere?
Also, there is a plothole regarding quartz. In the first Trails in the Sky game, the orbment mechanic, Mr. Melders, clearly tells you that quartz, in lore, regenerates orbal energy. And since there are orbal arts that can turn orbal energy into matter... well, then you pretty much have a post scarcity society right there, where you can create an unlimited number of materials and the speed at which you create it is only limited by how much quartz you have, which you can mine from underground...
Another thing that irks me: monsters and adventurer's guilds. What's to stop someone from catching a pair of monsters and having them breed, and then release the monsters out into the wild near a town or a village? Thus, the town puts out bounties on the monsters, and that someone can then kill the monsters (that they bred and released) and get money for it, and keep milking the system until they are caught. It's pretty much the cobra problem. I could see the adventurer's guild in some regions actually being a racket. Or why don't people weaponized monsters? If a country is at war with another country, why not send a couple guys over, have them buy a barn near town to keep their monster breeding operation in, and then during the night, release those monsters out into the fields near town, so that the monsters eat the lifestock? That way you can deplete your enemy's country's food supply and help tie up soldiers there as they try to deal with the monsters, and the country has to expend money trying to import more food. Or why not get those two guys into an enemy castle, and have them breed monsters in a house or a basement, and then unleash those monsters and kill lots of soldiers?