I hope that Kexi like all the Calligra software will benefit from having a big release every 3 or 4 months. This way more than ever users become co-authors.
First, it's worth mentioning the 2.5 series received many improvements in already released 2.5.1 and 2.5.2 versions. Many users apparently found the forums (the link is now forum.kde.org/kexi) more convenient than mailing lists; not only questions moved here but for actual improvement and some planning discussions. It's honour to work with people that not only devote their limited time to the project but also use Kexi for their daily tasks, yet they store and process their valuable data with it!
As always it's important to have updated software so I can only encourage to do that. If you distro is slow with updates - politely request it every time, that's their job as a part of the equation. Many distros catched up and Calligra is now pretty well supported. There is no reason to keep software in the waiting-room too long when every feature and fix counts.