I understand that it is complicated, to have that progress bar, and if you have a percentage of what you have already done or an example, performed 5 tasks out of 12, it helps a lot.
Invert actually helps, for example, sometimes the publication blocks, we continue to see the wheel spinning indicating that it is progressing, but in fact there is a message asking if we want to continue or abort ... how many times have you been "tricked "in this situation (",) :) I think I was deploying and after all, waiting for my action!
Inverting we always know what is going on, or instead of inverting, put the page to scroll down while advancing. This would be very useful and countless people agree with this idea, I do not speak here, but I speak on a daily basis, but if they think it will be something that the effort is immense I understand.
If it is not possible to do this, at least place these cases in which there is a need for intervention, these messages and buttons are placed in the upper area.