Just because all these features are inside doesn't mean you have to use them all to enjoy your Arranger KB...
we all play differently, have all kinds of playing technics, needs & wants, not all features interest everyone but at least they are there if you choose to use them to an extent....even with all the drawbacks and things you might wish to have on-board someday Arranger KB's are still very amazing instruments for those who choose to play them..
There is no right or wrong, however you use it is good enough. And remember down the road soon enough another model will come out tempting your Ego, Psych, Abilities & Pocketbook again & again.

have fun !!