Its not stupid engineering, or an engineering flaw. The brakes were put on the right side intentionally. Its hard to say for sure, but I would highly doubt Kubota would put the brakes there 'just because'.
Without knowing the FULL story, we should be careful about slamming an OEM. How do you know that Kubota didn't place the brakes on the right so they could offer other, more important features on the machine? As a vehicle engineer, I am faced with these real decisions every day. Just because a competitor can offer a feature doesn't mean every other OEM can immediately run to market with the same features. Each OEM chooses features and layout.
I've been out on customer focus calls. Some of the same people that gripe about issues like this also were vocal complainers about ROPS. In their opinion, a person should be able to 'ride it out' or 'walk off the side' in a tractor rollover. Its the same issue of people making judgement using only their limited view of the situation. Sorry about the soap-box rambling, but we need to calm down and think about it from the manufacturer's perspective.
From my visual observations (and no, I don't work for Kubota) it looks like their decision was based on one of the following: 1. Vehicle layout required it (I didn't see a clear path for brake routing on the opposite side) 2. If the allowable brake package wasn't designed for 'heavy use', placing the brakes o n the same side as the propel control will reduce operator braking duty cycle.
3. Kubota's safety culture drove the design. Remember that Deere's engineering is U.S., and Kubota still has heavy engineering influence from Japan.
Bottom line: Its not a 'flaw'. It is an intentional design decision that was signed off by U.S. Kubota Marketing, engineering, and a lot of other people.