I can't answer your question, Vali but if I may ask - on listening to the new A5000, is it a keyboard dedicated to non-North American styles? It sounds like it. I have no clue as to how to play those types of songs but from what I heard, it sounded very authentic.
In my opinion, there is NO keyboard DEDICATED for some COUNTRY SYLES. Yes, it has some features, ie. for Arabic countries, but this doesn't matter. You can easily sing your music in it without any problem, omitting those physic buttons.
In fact, Arabic singers needs those scale buttons on the left side of keyboard. It is a necessary shortcut for this feature. Those buttons wont tangle up, so you can ignore them. I think all modern keyboards has this feature, Genos has it, but is in menu, you need to access Scale screen to be able to use it. So, those buttons was build for quick use of function.
The priority thing here is
Section Time Signature, which will help us make styles with different measure type on certain style parts.
For example, Mains (A, B, C, D) could be in 4/4, and Break could be 2/4 (which in this case will become a half bar section), or could be 8/4 which in this case will become a double bar section. Or maybe you need to make a 1 & 1/2 bars of 4/4 in Break, which can be write as 3 bars of 2/4, so in this case you will write a 1 x 6/4 section in Break, as long as Break allows only a single measure (another gap in style engine).
Regards,
Vali