I like the character system of PoE2.
You have many options but its relatively intuitive how to build the char you want.
And yes, there are massive differences in power between several chars when you select the right classes, abilities and equipment.
There is only a handful of players who have beaten the ultimate challenge in this game,
but most players should have little problems to finish the game on normal if they do nor cripple their char intentionally.
This goes for normal. Now PoTD in PoE2 is a different beast. It is the hardest RPG I have ever played by far, to the point of some parts making me rage quit and stop playing for days.
Apparently when the game came out some masochistic douches complained that PoTD was "too easy".