If you don't care about achievements, want to keep the story characters for their quests and dialogue AND do not care for their default stats, you can always use the console to shape their attributes to their liking.
Again, do not do this if you want to earn achievements.
The one time I tried using console commands to respec in a very minor way (just switch one talent for another on two characters) it bugged my game, and this was on the latest version of PoE with no mods. I definitely don't trust those console commands, even if I wouldn't feel cheesy using them to reassign the stats of companions. Fortunately, even PoTD is not so hard you can't use the companions effectively despite their suboptimal stats.