The only problem I see with Time Mage for the most part is balancing issues. In essence, if you wanted to keep its spell arsenal anything similar to the one listed by Firon above (to keep the FF theme apparent in the job) it would have to be built as some sort of pure-support classs that can't excel in damage. In other words, it'd be like the BRD in XI with a bunch of ridiculous utility spells and a pittance of damage spells. Otherwise, if you wanted to build the Time Mage job as some sort of damage dealer/support hybrid, you'd have to heavily deviate from that spell list above, because it would be mostly as Firon listed, useless crap otherwise.

Once you deviate from that spell list, though, and shift Time Mage's arsenal into something that would probably fit into a game like XIV (we don't know enough about ARR to make any sort of decision as to what type of build works for a class, as that's being completely reworked in itself), it really won't be a Time Mage anymore in the traditional FF sense, in my opinion. The fact that we don't know enough about how ARR's battle system will work, or what a class will need to function properly in its respective role(s), makes it unclear as to what type of classes and archetypes will be able to work well in ARR. I'm still curious to see how they will build the Arcanist class in terms of playability and skill selections, as it does not seem like the traditional FF standard for a Summoner class so to speak, which is probably a good thing. ARR may have a place for a class/job such as Time Mage, but it's "arsenal" wouldn't resemble anything like the one up there if it was. I'd imagine more "unique" spell/abilities than standard "Stop" and "Slow" and "Reflect" themes, as those are kind of one-trick pony spells that would of course be easily abused if not built right, making it more likely that there would be other ways for a Time Mage to excel in the role the devs would have in mind for it to fulfill, whether it be support or otherwise.

I'd care alot less of trying to figure out what spells would be in a Time Mage's arsenal if it were to ever come to be in ARR, as that's kind of beyond our knowledge at this point to even think about without seeing more of ARR, and care more about how cool Time Mage AF could possibly look? I'd die to have an adorable Time Mage dunce-cap type thing on my Lalafell. Bwahahaha. ;3