Guys, please remember that the browser has been rebuilt from scratch. It's going to take a while to get all of the features we want back in.
No mouse chording (distinct from gestures). Wikipedia even highlights Opera as a key implementation of mouse chording, and now its gone. http://en.wikipedia.org/wiki/Mouse_chording
No closed tabs drop down. Its not uncommon for me to want to dig out a tab I may have closed 20 tabs ago. Reopening one-by-one is terrible.
No forward slash search (á la Vim, or indeed, Firefox)
If these things aren't tabled for Opera 15's release, then thats it, I'll be back to Firefox after 9 years on Opera. These sort of small features are Opera's bread and butter, things that have become second nature to me, and I suspect many. Certainly for me, its these little things that have kept me on Opera until now.
Where can we go to provide feedback? The OP provides no obvious link.
Trying to be positive, Stash looks like it might be useful.
Judging by past Opera development, they always need massive complains to fix something.