Well I hope you do, some of us have been playing the JP servers ever since it started. Personally I wouldn't say it's anything like that. It defenitly got that pick up and playish thing to it, but not because of the game mechanics, it's moreso because of how easy the game is, well in my opinion at least.
In spiral knights the mechanics are easy, but once you reach harder content, you learn that there is a high level of executing them, and so the game encourages/forces you to play better untill you become really good.
The thing is, spiral knights draws alot of inspiration from the first PSO, but I feel spiral knights does it more than the sequel of PSO does. Wether that's a good or bad thing, i'll leave that up to you when the english release is there.