It seems time has come to standardize this and do like the yanks.
There is a nordic initiative to have a common TA. They're looking at either 10.000 or 18.000ft. To me the lower seems futile as it would not be suffucient in the mountaineous areas of Europe.
And in my thinking how to determine the TL should also be common. If it is a "safe" 1000+ft or not is not important as both ways seem to work, but it should be done the same way everywhere to avoid confusion.