I burned out on turn based final fantasy clones some time in the PS2 era, still mostly stuck to this day (I certainly don't play them for pleasure).
Late in the PS3 lifetime I reviewed a bunch of games from NIS. Theoretically they were turn based but you could skip everything from text to animations with a single button press, and speed things up rapidly without it.
At the same time I used to play the old might and magic games. A feature there was the option to trigger turn based mode. Similarly I played Eternal Sonata and it gained more and more real time elements (optional) as the game went on.
The reason I mention all this is "demake" type things are just another game. You can rip the sprites, music and story if you really wanted (by the way doing that may kill any desire you have to play it -- ask any translator if they want to go back and play a game they considered every nuance of the script of over the last however many hundred hours) but while skills are needed to originally make any those it is likely not going to be the major time component of this. Even if you went on a modern PC and coded for that rather than the base console it is not going to help much. On the other hand adding in such features as rapid text, maybe some light prediction of moves, binding a button to attack or certain spells... is considerably more doable. I don't know that I have ever seen such a thing but macros, button tweaks, text speed increases and other speed up/skip options we see pretty much all the time. It would not be a starter hack or possibly even that good to learn with (if it motivates you then great, if not then don't) but at the same time a fairly well versed hacker would make progress in good time.