I personally say yes, for a few reasons
1. Blackberry balance: before there was a problem that people that got a blackberry at work could not make full use of a blackberry because the boss blocked a few things. This problem is now gone, because bb balance lets you have two profiles : one that the boss can control and one for home. There are even two app worlds.
2. Browser: the browser is incredible. It has a a 485 /500 score on the html5 test which is the highest amongst mobile platforms.
3. Hub and peek: you can peek anytime into the hub, a unified inbox, even while in another app.
4.apps: rim is doing a lot to bring apps to the platform and it will have the biggest number at launch.
5. Keyboard. All those that have to type a lot from their phone love blackberry full touch and qwerty keyboard. Its simply the best
6.small cool features:. Camera app, pic destroyer on browser, etc
These are the things that'll bring subscribers back. I must admit that their biggest challenge is marketing but i think their new cmo knows what hes doing