One report stated there was a problem with bringing the banks into it as the idea is to coincide the ETA with the 300 baht tourism tax. So yes I think it's an IT issue which will be resolved next year
I've really no idea. You would have to read the DTA signed by Switzerland and Thailand, and ascertain your own residency status. What people don't realise is every individual situation is different.
I have investment properties in Australia so I will register a business which will "administer" the properties. A friend of mine hit on the idea a couple of months back. Essentially all he does is answer emails (which he's done here for years anyway - although previously technically illegal). I'm in virtually an identical position. Just think imaginatively and you'll come up with something