They aren't worth the same. They planned to do that but voted not to do that in the end (or voted to delay the changes I can't remember). Q is a thing though , but BVs not changed. (Same as before).
Because nobody actually thought through the scoring for a quad axel, as nobody has landed it yet. As soon as somebody lands it they will probably re-vamp the scoring system and base values (Probably adding from 5T-5Lz as well)
? If that were the reason, they wouldn't have dropped it's BV... The closest thing I've seen to a real reason is that it's to prevent injuries due to the extreme difficulty, but they forgot that athletes do crazy stuff all the time whether it's rewarded or not.
TBH I just don't think they thought it through at all. It's possible they might not have wanted yolo attempts where they try to do a jump they aren't capable of - if it were 15points for example (which is probably in the region where it should be) you'd have a 12point base value for under rotations, and so going for a fallen 4A< would be worth instead of a triple lutz in case they happen to accidentally land it. (and this sort of yolo attempt is possible from certain skaters).
I think if they didn't want any of the things you're mentioning, they could have just banned it from competition (or assigned it no base value at all, like with quints). Then it wouldn't have mattered, only very motivated skaters would be doing it then (much like no one's really going out of their way to train quints of 4+4s, except maybe a few you hear whispers of, because they just don't matter with our current CoP). But as such, it's a confusing base value, for me.
Well, they didn't really make it linear or close to it.
Rqthee than actually just linear, I meant a linear type graph. 9.5, 9.7, 10.5, 11, 11.5, 12.5 has a PMCC of 0.9868, which indicates very strong linear calculation. If you set it to 15, the PMCC becomes 0.8882 which is still fair linear correlation but not as strong.
I don't think finding a 3T harder than 2A is the same thing. I'm sure you know many who agree, but that's not a generalization, and not really taking certain factors into consideration. Just as one consideration, say 10 people all know perfect 2A technique, but those 10 people know flawed 3T technique making it easier than the 2A for them. Then it's not the same thing as 90 people knowing perfect 2A technique AND perfect 3T technique (that they find makes 3T harder than 2A for them).
I'm talking about 3 or 4 with good technique for both. With 2A you can't use momentum with the hips and throwing leg as much for a jump making it actually pretty difficult for some people. Regardless, it's difficulty vs a 2Lz is extremely hard (there's a reason some people get stuck on it for years and never land it after landing all doubles). Lots of people do land a triple before a double axel, probably more don't but that's because they train it first.
