Yea these articles are very old, one would think they can provide a USB connection by now, (also given the articles they are quite open to provide various modules and/or custom works), still I wouldn't call it a deal breaker as I'm pretty sure there are adapter available. I got a response today basically telling me that maybe their product might be too 'pro' i.e high-grade material for my need & use as a private consumer, although the person sounded very friendly and curious about why would I need their product. But he didn't really gave me any real info so I'm still waiting for more specs or price as the conversation continues.
The VKB unit indeed has pedals that are a bit weird in term of general design, though I wouldn't call that deal-breaking either, still if I would be to order those I would definitely go for the other pedal design that allow for a more combat style experience, they state that "There is a possibility to order short pedals pads, which allows to use pedals keeping feet on a floor." I can't find any other info and medias about that particular rudder pedal set though. I tried contacting them a few months ago but still no sign of life to this day, maybe you'll have better luck and they can provide you with some photos and infos. I know I'm not spending 600+ euros (counting VAT) without a first-hand contact with the manufacturer or the reseller. That website I provided is, from what I gathered, a relatively recent Europe antenna from that Russian company so maybe they're just not really ready just yet.