Just for the sake of balance I think you're being somewhat unfair on the Robin. Yup, the rudder's a bit hefty, but otherwise there's not that much between them.
Flown quite a bit in an Alpha 160A (which is a 2160 robin built under license in NZ) and both a regular/super decathlon. Yes, I prefer the decathlon, largely 'cos I'm a tailwheel snob, but frankly the Robin is perfectly capable aircraft.
Nausea advice: You will get it, and it will get easier the more regularly you fly / with acclimatisation. Plan frequent short flights, and knock it off when you start to feel bad!