@Tempest
For how often mage players bring up "disbelief", it never seemed to be much of a thing in actual play
That has more to do with the nature of a MU* setting than anything else. The majority of PCs tend to be supernaturals or folks who won't provoke Disbelief to begin with, so the people you're interacting with in day to day roleplay aren't a problem. The NPCs around you should be, but the majority of folks who acknowledge that are by definition not doing things to provoke disbelief, so you're not going to notice them. A mage who can pump all his stats to 8 but isn't walking around like that all the time is, by definition, not bothered by disbelief.
It's the handful of assholes who do it and pretend like nobody would ever notice you've got Dex 10, Str 10 who make it seem like the rest of us are just ignoring it. The worstmy own mage did was Stamina 8, and even that was only occasionally.
Managing disbelief for mages is a lot like managing the masquerade for vampires: If you're being careful, it's probably not going to come up unless a Storyteller decides to make a point of it. Disbelief is just kind of more nebulous in that the line of where it'll be provoked isn't always agreed upon, and the natural inclination of people to err on the side of being dicks doesn't help.
and people love to brag about "omg I can do XYZ without causing disbelief", in a fashion that seems to imply they know they're being asshats and effectively breaking the system.
I'm not sure what you mean here. If somebody's saying they can walk around with Str 10 without causing Disbelief then yeah, they're being an asshat and effectively breaking the system. If they're talking about Legacy attainments, then it's effectively breaking the system in a way the system intends it to be broken.
Here's to hoping the new book makes them less ridiculous and gives some actual downsides to being a mage.
I dunno, nVampire didn't make sunlight any more of an actual downside to being a vampire in practical terms. When all your scenes take place at night and everybody handwaves how much shit is absolutely not open or active at 4 in the morning you might as well be daywalking.
There's not really a way to make them 'less ridiculous' in a way that's meaningful to anybody who already doesn't like Mage. There's a lot of tweaks to the basic system, though. Fast casting is supposedly much more difficult (default of everything is ritual cast and you need extra effort or power to drop shit on the fly) but the things people whined about the most were generally not the on-the-fly shit to begin with, so while that will count as a pretty substantial downgrade in power to people who actually play Mage, it's probably meaningless to people who just complain about it.
What game is this that allowed custom legacies? The Reach? I don't understand how a multi-sphere game can allow custom shit in one splat, and not others. Another mark against the asinine idea that is "sphere staff", imo.
TR allowed custom Legacies, yeah, but you're absolutely right about the first part. It should have been allowed across all spheres. I don't see it as having much to do with sphere staff, though, especially given the amount of rotation that took place in most spheres on TR.