@Xxain
I'll address your points one by one, giving you examples of JRPG's this gen:
1 - Lost Odyssey; Classical JRPG Turn based game with little to no action oriented gameplay
2 - That's why I've been saying about the Graphical Upgrades only
3 - Pretty much every JRPG released since the PS2, they could simply add VA to every line of dialogue in the game that was relevant
4 - Lost Odyssey once again; It has a perfect World Map that really reminds you of the PS1 FF days
5 - Once again, they only needed to change the graphical input of the enemies and their animations
You see, other than upgrading the graphics, adding VA's, doing new animations and doing everything in the HD style, the similar feeling of the game can be pretty much kept.
And by this I mean the same combat mechanics, the materia system, the story, the minigames, everything can be kept the same and still work.
Current PC Build
CPU - i7 8700K 3.7 GHz (4.7 GHz turbo) 6 cores OC'd to 5.2 GHz with Watercooling (Hydro Series H110i) | MB - Gigabyte Z370 HD3P ATX | Gigabyte GTX 1080ti Gaming OC BLACK 11G (1657 MHz Boost Core / 11010 MHz Memory) | RAM - Corsair DIMM 32GB DDR4, 2400 MHz | PSU - Corsair CX650M (80+ Bronze) 650W | Audio - Asus Essence STX II 7.1 | Monitor - Samsung U28E590D 4K UHD, Freesync, 1 ms, 60 Hz, 28"