Why are the free commenting tools less user friendly now?

I use Adobe Reader for proof-reading (in Danish). In earlier versions of the Adobe Reader software, if I wanted to replace a piece of text, I could simply mark the text and write the correction directly in the text file. The old text would be crossed out with a blue line, and the new text would appear as a comment. Also, if I wanted to insert, say, a comma or a space, I could simply mark with the cursor where the text needed to be and type in the insertion.

Now I have to constantly press the commenting toolbar if I want to add or mark text, and afterwards I have to press the toolbar again to get back to the cursor. Having to do this for every single correction is a pain. Only the deletion of text retains the previous function (using backspace).

The old system worked perfectly, and I wonder if there is any way to enable the old functions? This new system is literally making my job harder, and I am considering looking for other text commenting software.