Living in a post iWork ’09 world
Lots of us aren't thrilled with this new iWork package and while it might be good for us all in the future (like bad tasting medicine) right now the picture isn't so bright. So what is an iWork user supposed to do?
Thankfully upgrading to iWork '13 didn't delete our beloved iWork '09 applications and despite some confusion, Mavericks and iWork '09 get along just fine for the most part. There are a few gotchas, mostly having to do with iCloud integration. The Merging Inspector is broken but merges can still be done by using the Merge Field option of the Insert menu. Those are the only two problems I've found and I've been using iWork '09 and Mavs for quite a long time. I'm not saying we won't find more issues and I'm not saying that a year from now the next version of OS X won't break iWork '09 more. But for now there is no reason we can't continue using iWork '09. DropBox has been my preferred method of syncing between the Mac and iPad and I don't see that changing.
If you bought your iWork '09 programs through the Mac Apple Store do not delete them and do backup your computer now. I don't know if Apple will continue to make the old version available to us but they are gone from the Apple Store so it will take some effort on our part to get them restored to our computer if we delete them. On the other hand, if you have no desire to use the new iWork 2013 programs you can safely delete them. Now that you have downloaded the new programs they are in your purchased list and can be downloaded again in the future, at least until a new new version is released. (May that be soon please!) Peter has suggested putting the new iWork programs into a Disk Image which is nice way to put them aside without deleting them.
The two versions of iWork can co-exist on your computer peacefully with one caveat - double-clicking on a file will open it in the new version of Pages (or Numbers or Keynote). This is standard procedure and it works the same for other programs such as Microsoft Word '08 and Word '11. I'm in the habit of dragging files to the Dock so this doesn't affect me much. If you do accidentally open a file in Pages 5 and it didn't go well, just be sure you don't save the file - and if you do save it be aware that under export you can export a Pages '09 file. Warning: I've done this and it works but I haven't tested it fully so it is possible that exporting a Pages 5 file to Pages 4 can lead to formatting issues. TimeMachine may be your best friend to restore a file that Pages 5 mangles.
While I will miss many features of iWork '09 I do find much to like about the new Pages and I intend to use both it and the old version. I've always preferred small single purpose applications to monolithic monsters; that's why I dislike Microsoft Office so much. My writing arsenal includes Pages, Scrivener, WriteRoom (and MS Word when I must). Adding another version of Pages to the mix doesn't bother me - especially if Apple has finally gotten iCloud syncing to work reliably. Having an iPad version of iWork that can truly edit and extend what I've created on my Mac plus having the browser version available when the only computer at hand doesn't have iWork is a big win for me. My iPad is a production tool and not just a consumer of media so I'm excited about the new parity between Pages for Mac and iPad even though it does mean some lost features.
Finally, we need to use the Feedback item under the Pages menu to let Apple know what features we want back and what needs to be fixed. Having worked at various customer support jobs in the past I know that abusive, insulting, and antagonistic communications go to the bottom of the pile and ultimately the round filing cabinet. If you want to see iWork improved make your feedback constructive. My approach has always been to write one feedback message per issue and to explain why the feature was needed (or was badly implemented, whatever) and how users and Apple will benefit from fixing it. Short, to the point, polite; that's how to get positive attention. I honestly believe we'll see an improved iWork and that it won't take 4 years. We can influence how Apple improves the program if we use feedback to provide constructive criticism and suggestions.