greytulip, there maybe teething problems on the new calculator, but as far as the changes and petitioning Home Office, I doubt it will have any good. Right now, being tough on immigration, especially discretionary economic immigration isn't going to lose anybody their jobs right now in the current economic climate. The only thing that will likely work is to see what the fallout is and continue to point out to the government that they are failing to attract and retain the right type of talent in the UK.
Also, if you have paid and submitted your biometrics prior to 31st March you should be considered under the old rules.