Rain it is very possible to set Studio One to automatically arm tracks that you land on. You do not have to manually arm tracks at all. As for getting around the GUI I have been using a Kensington Track ball along with the mouse and it is quite interesting actually. Also if you set up your key commands correctly navigating around Studio One is just as fast as Logic. I have never had any pain. I can navigate around S1 at supersonic speeds without any issues.
That is the problem with switching programs. You will never really give the others a real test because you won't be using key commands in the other DAW's to their max advantage.
New Studio One features also include freezing multiple outputs of VST's all at once now and tracks can be set to record the outputs of any buss now which is also very cool.
I still find midi timing
(external to hardware synths that is, not virtual VST's that is a different story) is superior to other DAW's and is NOT effected by how hard the audio side of the program is working. Also you can switch midi tracks on the fly (while looping) and record any data on tracks you land on. Something not all DAW's can do either (including Sonar) I agree the midi effects side of S1 could be a bit better but then again I have never needed it either. It has all the midi editing and features you actually ever need. If you can play a keyboard then it makes it all easier. Comping is brilliant too. Tempo changes and key transposing is fast and easy in this program too.
The learning curve is actually fast and easy which goes to show how well written and designed it is. I find when I go back to Sonar
(8.5 that is but I am sure X1 and X2 might be better for sure) it is clunky and hard. But it also depends how much time any of us spend in any DAW. There are plenty of Sonar and other DAW users out there who can navigate around in any program fast and easily. I have seen some pretty amazing PT users operate as well so it does depend how well one knows any program. It is basically about what you know.
(Seth,Brandon and Karl and many of you for example are amazing Sonar users) People make unfair and incorrect statements about other DAW's but in most cases it is usually because they still do not know it fully. For example
Rain I am sure I know Studio One better than you because I have used it everyday for the last two years something you have not done. You will not reach that level of proficiency until you do the same. Using it here and there is not the same thing.
(And even if you do use it a lot, it wont as much as I do) And likewise with Logic I see you as a very experienced Logic user whereas I don't use it that much.