right now I have many campaigns that point to one single product. i decided to create a new dedicated domain for this product. i simply want to change the landing (and display) URL in my adwords account for all these campaigns.
I've never done a URL swap, and I dont want to fire off any red flags on my adwords account due to the entire domain changing. It is in fact the same exact product being advertised, with the same keywords, same ad, etc, just a new domain.
Sure, I do it all the time. The history starts over, but if you don't care about that (and I usually don't) there shouldn't be any problem. Just make sure all the ads in the adgroup are going to the same TLD.