I have to echo many of the posts above. I use presentation mode many times every week. It allowed me to bring up my teaching/speaking notes and scroll through without having to worry about accidentally editing something, or getting hungup with the keyboard, following a link, etc. I did not share the image off my iPad... it was just so I could see my notes. You could give me equivalent functionality back by having a feature to lock editing on a note... a view only mode. I also only used presentation in "night" mode as it worked best whether on stage talking (under stage lighting) or in a room with the lights on.
I have to say I do think it was irresponsible to take away a feature and not include this information on the update notes that come up in the app store. I would not have updated if I knew presentation mode was not going to be there.
For the past three years, I have loved Evernote. This loss of this feature is serious enough to me to start looking for a new platform. I came to Evernote so I would have one place to do everything - research, take notes, create lessons, teach, present, archive. What is the point if I create in Evernote and now have to export to something else so I can present it? I'll have to find someplace to do it all again.
Please fix this!