honestly, the deck, like u said is only a problem when they have a good opening hand; otherwise, they are severely punished against aggro cuz they have no massive board removal. Swipe helps but it won't do much when minions have higher health.
The deck largely suffers from the same problem res priest does, it's completely brainless and often games are decided before turn 6-7. I've played the deck myself and realised it's not a fun deck to play (my opinion) as it's tilting whenever you a bad draw and can literally do nothing but concede. Playing against it feels the same as well if they don't draw half-decent (embiggen/ breath of dreams) in opening hand you win.