One thing Diablo III did really well (after a time) was allow us to customize the elemental-type of the ability we wanted to use. As a Wizard, I could choose Meteor as a Cold-type spell. Or I could select a Lightning-type Hydra. It allowed us CHOICE - the ability to build using the spell I wanted to use plus the elemental damage type I wanted to embrace.
I'd like to see this system return in Diablo 4.
I might want to try a Fire-type Frozen orb; or maybe a Lightning Hydra. Maybe I’d like to try a Cold-type Firewall build. I am not proposing changing the spell mechanics like Diablo 3 tried to (and failed spectacularly in most cases, they tried to make the spell runes do different things, instead of just customizing the damage type.
This is too hard to balance.
I am proposing being able to customize the elemental-damage type of abilities, such as "Firewall" or "Meteor" or "Frozen Orb" or "Frost Nova".
Such a system, presumably, would have to change the particle effects of the spell and probably the sound effects as well, and it would have to interact logically with affixes that read, as an example: “Pyromancy spells can do X”. So if choose to build a Fire Frozen Orb build (So Cold it Burns!) I would expect that affix to work intuitively with the “Pyromancy spells do X” affix.
I suggest, somewhere down the line, maybe a system could be built so that we can change the elemental type of damage spell by inserting an Elemental Rune into the spell. Maybe Ral, Ort, and Thul runes can make a triumphant return and the system can call back to Diablo 2 rune fantasy and allow us to customize elemental type by being “inserted” into the spell to change the element-type.
Or Maybe it doesn't need to be that complicated.
Maybe one of the paragon boards Sorcerer abilities could read: “All elemental damage you deal is now Cold/Fire or Lightning type”, where the type is determined by the theme of that board. Maybe it’s simply a legendary affix on an item that does this.
All the same, I want to build around not only the ability I want to use, but also the element I want to use.
Feel Free to add your two obos if this is such a system you or whatever class you play might be interested in!