Not accurate, they are in engine and you can use this mod to run them at normal FPS. 30 FPS is probably for the cinematic feel, I know some players prefer it and reverted to the 30fps cutscenes.The cutscenes are ugly AF; they're those low-quality pre-rendered videos and they run at 30fps.
Similarly to Path of Exile there are countless builds varying from poor to mediocre to god of destruction. It's pretty much impossible for the devs to predict what team build/skills/combos a player will use, I think they did an ok job for the majority of players who will be somewhere around 'average'. There are mods like this one which will allow you to make the dodging and parrying harder if you wish.So balance is not great IMO.
If this game is what you call jank, then I'd take jank any day rather than the tripleA $400 million dollar polish of games like Concord.There's quite a bit of jank.
A solution to this does come later on (so it might be a good idea to save some of the far off exploration for then rather than now when you're still early game)Overworld fast travel would be welcome.