It will work great with custom programming.Just looks cleaner too based on some other pics you posted. Shame about lacking eco/sport I would prob program it with 1-3 being 750w equivalent of 1-5, 4 would be 1000w 5 equivalent, 5 would be 2300w full blast.
My Juiced RCS just has 5 levels and its fine, 1-3 seems to be class 2 pretty mellow, 4 is class 3 speed pedlec and 5 is just max controller output which is slightly above class 3 at 31 mph top speed.