I fly for business and was P1 with Qantas, purely from domestic flying. I had to change because they became too unreliable. I see the Virgin changes favouring the lower price fares. 15 SC's is the current earning on a single leg. Most single legs are > $180. Chuck in family pooling and there will be small gains made.Of course, that's what it's all about. But how will it actually fly, given that most business flyers use Qantas?
At the other end, business class flights, especially multi-leg, will earn significantly less. Personally, I think it will reduce my spend with Virgin. Currently, I aim to get to 1800 SC's in an earning year as this allows me companion Platinum (1000 SC's over retention). This means if a Flex fare is $400 and Business is $600, I'll often pay the extra $200 for a more comfortable seat and more than double the SC's. With SC earning based on $'s, I'll take the cheaper fare and try for points upgrade. Basically, I fly enough that I'll get the 800 needed to retain and I won't be forking out an extra $12,000 so that my daughter can keep Platinum.