Recently I bought N9 (64 GB) and I have the following important comments which are disappointed me a lot:
The above features are all known and available in old nokia devices and other smart phones.
I am really disappointed and I don’t like N9 because it is not practical and doesn’t meet my needs!!
2. Can't edit an email that in inbox when I want to forward it?
3. Can’t copy/cut email or any word/sentence in any email?
If you move an email from your Inbox to your Drafts you should be able to cut, copy, edit and paste from there before re-sending. I know it's not a perfect solution, but at least the functionality is there.
If you don't like the N9 and it doesn't meet your needs your only option is to sell it and buy something that does.
...and discard the brand which makes it altogether.