Just thought I'd throw some ideas and questions out there. If others want to contribute they may.
Scan
I find Scan useful as it is, but other people do not. If Spout could display the health of the person Scan was used on, in place of their title, there would be no debate. Sometimes it's difficult to aim at others when using it, however. If the range was increased, or it didn't require such exact aiming I would appreciate that too.
Blink
This skill is addictive, I love it so much. The gunpowder reagent is a pretty good thing, I think.
There is one issue: When I use the skill I teleport to the corner of the block I aimed at, putting me at an intersection of multiple blocks. This has some weird consequences- I end up inside half slabs, or with my feet in the stairs, or I take a quick bit of suffocation damage. I realized that Blink puts me at a location with no decimal to it, such as -40.0, 25.0.
Can Blink be configured to send me to the center of the block? Something like -40.5, 25.5. This seems like it would do away with a lot of little issues.
Upcoming Reagents- DONE
Kain said that Bolt and Megabolt will cost redstone to use in the future. This is basically acceptable, but what if instead of redstone, gunpowder was the reagent for these skills? I'm probably just trying to impress my headcanon on the game, but it seems like sulfur could become a catch-all wizard powder without any negative consequences. Would probably cause people to fight more creepers and make the stuff more common at markets as well.
Megabolt
Continuing on from that, Megabolt feels a little impractical already in my opinion, although not terribly, and now it will be getting a reagent added to it. Could we increase it's range? 75 mana is steep no matter how I slice it, and even as a master Wizard it's half my bar. If it's range was as long or longer that Bolt's I'd be willing to use it sometimes.
Range in General
Inspired by but not necessarily specific to the Bolt skills- I think that targeting methods could be expanded upon. What if Y-coordinate range was separate from X/Z range? I could then, for example, drop Bolts on people far below or on top of a wall, so long as I was close enough to them, which fits the nature of the attack more. Altitude can become a much bigger issue in Minecraft than in other games, and Heroes ought to take advantage of that.
I feel like this would take a while to implement if the coders decided to take it up. This falls more into musing than "I want this now".
Scan
I find Scan useful as it is, but other people do not. If Spout could display the health of the person Scan was used on, in place of their title, there would be no debate. Sometimes it's difficult to aim at others when using it, however. If the range was increased, or it didn't require such exact aiming I would appreciate that too.