I've seen them twice as well and tbh opening for Opeth they didn't get good sound like nobody bothered for them and they probably couldn't hear themselves well either which made the entire performance meh. With proper soundcheck etc though, they were awesome. Perhaps it was the venue or having to rush through trying to get a decent sound like most opening acts.
I wish they had sounded this good the times I have seen them. Unfortunately both times I saw them the sound quality was horrible and Jonas's voice was always out of tune. :(
ive seen them 5 or 6 times and they were soooooo good live. maybe just a bad venue? give them another try live and hopefully you will hear/see what I've been able to! :)