>>58783054By making it at least mainline, not some shit rushed filler that didn't even have an official meta or natdex like BDSP that was dead on arrival since PLA was released around same time. It didn't even have some trainer design updates or changes to be impactful or improve its trainer popularity which is mostly niche beside shitrona and Dawn.
Less handhandling or random soulless legendary and mythical events you get delivered at the pokecenter. The old style overworld nostalgia can be a good bet for a videogame but if it introduced new characters or redesigns and new pokemon it would be an issue, everything needs 3D models now for other games and media.
Actual decent battles, not level up movepool trainers and retarded moveset rematches with the leaders and league.
And something that will never come back, battle frontiers.
Then again, Hisui was the real Sinnoh revisiting and new approach experience.