My best advice is to create an alt on another server (level enough to get party finder) and see yourself how it is... Sure you won't be able to experience much but you can get a general idea without wasting money for a transfer to a server that you may end up not liking.
My personal experience is limited on Lich, I like the server, there are a lot of nice people and I love my free company.
For the duty finder, if you want to stay in EU, then it probably won't change much... The only bad experiences I ever had were in the CT duties, as 4 man dungeons usually runs smoothly for me.