Out of those 6 you mentioned, you can definitely rule out Metallica and TSP, they have big shows planned in belgium just prior to the event, so no chance of seeing them appearing (especially on that Friday which already super stacked). The Strokes were ruled out by an insider ( @Jazebel) that always gives us solid info, so we can probably rule them out too. For the 3 others, I am hoping one of them can come but we'll see. There also is always a fair share of names between Werchter and Glastonbury, in 2017 they had 2 headliners in common (Foo Fighters and Radiohead), so I wouldn't worry too much about some artists being unavailable.
The general vibe is pretty great, getting drinks at the bar is always quite fast, and the barn is perfect for afterparties, with DJ's after the festival ended every day, and a pre-party the day before it starts. Other than that, it's just a great and fun festival to be at, but it's nearly almost axed around music, so definitely a different vibe than festivals like Glastonbury where there's always so much to do.