I think it does make sens because with elemental damage bonus you kinda want to have all your spells deal the same type of damage. Let say you play Lightning wizard (either because you found awesome lightning dmg boost items or you simply like zatting stuff), what are your options? You're blessed with primary, you've 9 runes and doomed with spenders as you only have 4 (6 if you consider hydra and blackhole as spenders).I personally enjoy that some spells have restrictions on their elements. Feels unique. And if you want fire and forget Arcane spells, Energy Twister is an option (Wicked Wind for a static DoT AoE). It's very different, but it's a possibility ; I view Arcane as a strong direct-damage element, it doesn't feel right to give this element a good DoT spell.
Some spells really could get more elements,Blizzard isn't really used and could benefit from having a lightning and fire version. Unrelenting storm could benefit more damage from loosing its slow. Stark Winter could be lightning and instead of slowing could stun or buff allies withing the storm or reduces lightning dmg skills cost by X%.
When I look at the new wizard (don't get me wrong, 100 times better than 1.0 wizard) so many things changed for the best and yet it still look unfinished. So many horrible skills that only had 1, barely 2 usable runes look promising now. Arcane Orb, Energy Twister, Meteor, even Magic Missile. And yet, some didn't change.
They weren't used and you really wonder why they didn't changed few runes. Arcane Mine is imo a good exemple, after the damage boost people started to use it because it proced well CM and dished tons of damage. But seriously, is it how those mines were supposed to be used? To be spammed on yourself for cheap delayed powerful aoe? Why can't we cast them while moving? Why instead of being channeled AT doesn't get a 10-15sec cd and instead instantly releases close to you 6 mines ready to explode. Defense skill with great offensive potential. But no, it's just a delayed channeling.
I agree with you Jeatch you say each spell has it own nich that can be exploited for maximum effects and stuff. I know Disintegrate and Arcane Torrent aren,t exactly the same, one dish slightly more damage and have better proc ratio can go above wall while the other hits (well can) more foes. But shouldn't it be more than that? more than few digits difference?
When I look at Disintegrate and AT they remind me the old Arcane Orb runes. More damages, more explosion radius, reduced cost. Yes, they weren't doing exactly the same, you could abuse the reduced cost with rings and prism to spam 50 orbs, or you could exploit the crazy range with the weak old Temporal Flux. Yet the only one that really changed the way we played were Orbit and Galaxything. They were the one making you feel "THIS" rune is special and changes the way the spell behaves like it was a different spell.
Btw, pointing other class have less options isn't really an argument (for or against what I said), I'm pointing something that I think is an issue for the Wizard class. I know other classes have issues and some more than others.
Someone on DIII forums answered that if we want more "support skill" we also have CD Meteor. That was exactly what I was pointing. This rune totally change the way you deal with Meteor. It's no longer a spender, it's litterally an instant hydra that would benefit a lot from Staff users. Did Meteor needed another "40AP crash a molten boulder doing X% of your weapon damage"? It already has 4. Giving different effect to most skills would, I'm sure, increase build diversity and make the class more interesting. Sleet Storm is also a good exemple of how a rune can change the way we play.
Jaetch's build is what I meant by boringly boosting your damage. (damn 750k unbuff x.x.......) Arcane Torrent buffed by Familiar Magic Weapon and Cold Blooded (well thought btw, I was wondering yesterday why we would use this rune). The thing is, playing this way (1 spender 3 passive buffs) is currently one of the best way to dish out good damage with your Wizard. Mixing things (unless you have some specific legendary) isn't that effective and I find it sad.. Maybe (or not) more options, like cooldowns with special effect, could change that. And even if it wouldn't be the best way to go around, at least you'd have more options to do funny things, more active synergy like black-hole meteor.
p.s I'd like to see a 3 headed Giant Hydra on 2min CD that deals crazy-op dmg.