We had the same thought about quick login and we shared the same with Reuters team too. However, their point is also valid that if the trades are not reconciled, it may lead to financial loss. So on one hand there's some inconvenience and on other chances of financial loss. Moreover, by using the screen we mentioned in our previous post, the login can still be done fast without the need to download the scrips again. But we completely agree, this needs to be more intuitive.
For NEST Plus, you can use the same userid and password that you were using earlier with NEST too. For NEST Plus, the registration needs to be done with Thomson Reuters (earlier Omnesys) and is completely managed and controlled by them. We are already discussing with them if something can be done in this area. For now, you can still use your old NEST Plus id with NEST too.