Yes, I agree. This is the reason we have chosen not to go live on version 5.2.1. In our development environment, the gui’s have caused netconfig corruptions (several times) and have kept smat files open so they are rendered unusable.
We hadn’t figured out yet that this was all caused when not closing via the tab. That will certainly be helpful in the future. Hopefully these issues will be fixed in 5.3; this is too big of a risk to have in our live environment.