Firstly, there is an excess of focus on SPAMMING. I don't think Blizzard is creating these resource systems to stop spamming, as much as to make a more varied and fun game....spamming should be very much a gamer's own choice, right? (yes i spam bone spears :P)
I remember Jay Wilson or someone saying somewhere; "We want to make the wizard even more blasty, but even more vulnerable." I think what Instability means is that we'll probably see that if she really turns into a "light show" (i.e. lots of spells released in a short time), her defences will reduce and damage dealt will increase accordingly.
But even this seems to simple for an entire resource system so dunno really. But something on these lines.
Some wizard spells will be free-to-cast, others will use "instability". As the wizard fights, it's free-to-cast spells will build "instability", which will increase the damage of it's spells. However, with higher instability, there is a greater chance that on casting a spell, the wizard will damage itself. When a spell that uses instability is used, it'll reset instability to 0.
If you control your instability you will be safe from harming yourself, but won't put out as much damage as a wizard who takes risks.
i saw a post on here that was talking about resource systems and the new wizard system using like volatile or something like and not mana? Can anyone tell what blizzard was thinking or what volatile is and what it does?
We don't know. Just like we don't know what the old respec system was that they changed. They're just giving us little bits of information good for nothing more than speculation and with little to no context.
To be fair they have a HUGE amount of pressure to make this the best Diablo game ever.
A) They are not the original Diablo team, so if they mess up and this game sucks well then there will be a huge backlash at Blizzard for stopping the original team who has proven themselves on 3 different occasions.
This game is 5 years into development now, if it ends up being rushed or horrible well then people will be asking...what the hell did they do in the 5 year span? Beside redo everything the original team did which brings us back to point A.
C) It's Blizzard, have they ever been on time or even close to releasing games in a timely fashion? I am just glad I didn't know Diablo 2 was being created and I was just lucky my friends dad picked Diablo 2 up on the release day over the sims for him so we could play that day.