I don't know too much about the whole map situation or receptions of maps in EU, but speaking from a 'general NA perspective' --
Metalworks isn't really a map that is hated by anyone for the most part like Granary, Badlands, and sometimes Product are. It was one of the most played maps last season in ESEA because nobody would ban it and I think it plays pretty well.
We had a map testing tourney with Invite level teams/pug teams an offseason ago with Propaganda, Alamosa, Logjam, and Kalinka. Propaganda was by far the most well received in the tourney, but had mixedish opinions in league play (probably mostly due to aversion to new maps).