Note that 2.0 still can be used with GTK. I'm a daily wireshark user and had to switch back to the GTK version - the Qt version is currently incredible buggy - at least on Windows.
Please file bugs! It is sometimes surprising what developers don't notice. At most you'll file a duplicate. One bug per issue is usually best.
I've found it locks up on Linux sometimes. Like I found Clementine when I was stuck on Windows. Having worked with QT, and it's asynchronous'ness, I can see it's easy to make dead lock mistakes, and I think that is probably what is happening.
Yeah, I've noticed a few issues, particularly with copying bytes via context menus, sometimes the sub menus don't appear. Ah well, overall I'm glad they went in this direction as now I can use it on my MacBook without having to get X11.