I think it is getting 'better'... if you like that kind of thing! You see more decorations about these days.
But as i said before, i had only a handful of trick or treaters in London, NEVER had any in Glasgow, and despite my current neighbourhood being chocka with bairns, i have only had 2 or 3 trick or treaters each year here in Lithgae.
Nobody i know, even amongst the cool & trendy crowd at my work, goes to Halloween parties or Halloween themed club nights... I KNOW there are people that do, but it doesnt really seem to be that popular.