I strongly oppose the CBP preclearance expansion push into Europe as it will make for worse travel experiences for me as a very frequent EU-US passenger (with most of these mentioned airports being used repeatedly by me as a transit passenger or an O&D passenger). The check-in cut-off times will be worse as a result of this, and the lines will generally be worse for me in Europe with CBP preclearance during peak travel times than in the U.S during peak travel times for EU-US travel.
I agree. There are a few aspects that are problematic, first, its one thing for an airport where the vast majority of traffic throughout the day is going to the US (think YYZ). There are almost no TATL flights leaving at 8AM, so all that infrastructure is going to waste, unless they open it up, then lock it down and sterilize it. That, and LHR has what, 3 terminals with US bound flights? They're not set up for it.
That's the practical aspect. Then you have to have a whole throng of DHS agents set up overseas. So then they're getting paid to live, on top of additional salary due to being abroad. I'd rather they focus on performing well in the US before they start screwing around all over the world.