Having worked in mobile development and incidentally at EA Mobile, I can tell you that soft launches are a developer's way of having the application observed in production, with a limited audience. The application is then refined by studying usage, telemetry or spending habits so it can be globally launched in a short timeframe usually. The same thing occurred with Real Racing 3 for example, which launched in Australia, New Zealand and Canada, only to launch a few weeks later globally with the US and ROW(rest of world) versions.
Soft launches may mean there are bugs. Not all bugs can be caught by testing ( Hi 5 to the EARO guys :* ), but rest assured, if we can see them, then they are known about.
So to be concise, it's normal that a soft launch application may be buggy, but in time, they get fixed :)
This represents my personal opinion on the subject.
