this is why I am normalizing the drain of combat spells. I am very tempted to even the drain values of all spells across the board with the same drain values just hit spell casting with the remainder.
I don't think that's a good idea. The different drain values exist for a reason: to balance the relative power of spells with the risk of being forced to expend resources by taking damage (or spending Edge to redo the Drain Resistance roll, or otherwise trying to avoid the drain damage). Spellcasters probably shouldn't be casting Mob Mind, Mana Static or Mind Probe with the same ease that they cast Magic Fingers and Trid Entertainment.
Nor do I really want to deincentivize Stunball. I actually like that Shadowrun is one of the few RPG systems that actually
encourages non-lethal options. Most RPGs seem to make trying to bring someone down without killing them a huge pain in the ass. (D20 system, I'm looking at you.) I have no problem with stun effects having less drain. (But adding one more resistance stat to Direct spells still might not be a bad idea.)
But it seems downright backwards to me that the drain is so high on the indirect combat spells (where the target gets to dodge
and resisit damage with armor) compared to the direct combat spells (where the target just gets to roll Willpower or Body). Manaball is lethal to everyone in the radius, who has only Willpower to resist (probably hopeless against the spellcaster's Magic + Spellcasting), and has a Drain of Force/2 + 2. Fireball is also lethal to everone in a radius, but they get to oppose it with their Reaction (much better chance) and resist the damage with Body + 1/2 Impact Armor + Fire Resistance mod, and has a Drain of Force/2 + 5. Which is outrageously high as Drain goes: the aforementioned Mob Mind and Mana Static only have Drain of Force/2 + 4.
Basically, even at a low Force, anyone who casts Fireball and isn't either a high-grade initiate or packing one mother of a drain focus should expect to take damage from Drain. And their target is probably fine. That's not really balanced.
I think it might be more fair if the Drain on the Indirect spells were the same as Manabolt/Manaball, since I think that you can balance the advantages of one (resisted only by Willpower, effects astral targets) with the advantages of the other (can harm non-living targets, can harm unseen targets caught in the radius). I definitely don't think that it should be higher than the Drain on Powerbolt/Powerball, which can kill living targets with only Body to resist and destroy non-living targets by just beating a threshold.