Because of:
- 2000 euro price tag
- no harmonizer
- less expansion options
- no touchscreen
- less real-time parts (no second left voice, no third right voice)
- some features less or modified compared with G70 (eventhough there are many enough that weren't present before)
- keybed of less quality than G70
people will not think of it as the top keyboard.
But Roland clearly stated IT IS the flagship for BK series. I don't think there will be a "topper" offer and I do believe the BK will stay for a while to be the arranger instruments line from Roland.
Maybe a future refreshed G series will come back, but I don't think is for very soon.
And to answer the question - I believe there absolutely nothing wrong with it. I wonder myself how come there's so little noise about it. Or maybe there is enough, but not here.
First of the 2000 price is not a reason to call it not a totl arranger..
And then there are some of your reasons not present in other TOTL arrangers, like T5 not having a touchscreen, not having a 2nd left voice. and on top of that not having many other features that the BK9 does have like a step sequencer, a chord sequencer, the D-beam, better sound edditing capabilitties..
It says clearly this is rolands top of the line Keyboard... and what people fail to see is that the contenders are much much much overprised of Roland can sell this contender at this pricepoint. Just face it, this is Rolands new TOTL arranger at a great price, and its a great effort... if you like the Roland sound, i guess your get an awesome deal.