They try to sell you already-unlocked skills for your Heroes! Not only that, but it makes NO sort of mention or clue that I already have access to this skill, forcing me to have to check my lists and see if it's in there or not. Why would I spend a Hero Skill point on Barbs when, as you can see in my drop-down list, that I already have the damn skill unlocked? My Heroes can already use Barbs whenever I want them to. Is there a tangible point to having it set up this way, or is this just laziness in the implementation? The first time I saw Barbs being offered to me I thought my account got bugged or something.
Obviously this isn't a serious problem, but it's kind of lame regardless.
I really think the Hero Skill Trainers should have some sort of filter so you don't end up wasting Hero Skill Points on those skills your Heroes technically already have access to. Just make the HST skill window look like the normal skill trainer windows so their lists have the 'Unlocked' part next to the skills your account already has. None of this button-to-buy crap.



