Have yet to experience crashes or game restarting bugs or anything of the sort - but, I'm currently unable to take the practioner skill known as harmonic shielding, and I have no clue why. I should have the prerequisites for it. I think either it's a bug, or I'm really stupid and not noticing something.
I've earlier been unable to take the skill opposite to it - meaning harmonic shielding and two others form a group of three and HS is to the right. I assumed that you can take only either the one to the left or the one to the right of the middle one. Not sure if that is true, though. Anyway it doesn't seem to be explained anywhere.
I'm just really confused how someone could conclude that the heart and soul of Bard's Tale was the first person perspective and then strip out full party creation, stat system, item systems, most of the classes, random battles, and then add a dumb skill tree and CCG-style combat.
Maybe because most of the things you listed were already as simple as they come? I'm repeating myself here, but BT1-3 weren't especially complex or deep games:
Stats were random and leveled up randomly, too, until you would max them all out eventually, making them not exactly very meaningful in the long run.
Classes (which were not that many to begin with) were simple with little to no way to differentiate them (magic users having slightly more). The skills actually do give you ways to build your chars somewhat differently now outside of just choosing different weapons.
Item systems? Yes, you had items in the old games, you have them here. There were some restrictions back then, there are now. You would find better items over the course of the game, you do so now, etc.
Random battles? Ok, apparently some people really do like grinding. Eventually I just got a bit bored by them.
Now, I'm not saying that BT4 is the best shit evar. There are certainly things I would have liked to be done differently (amongst them e.g. char/party creation).
However, people apparently forget to take off their rose-tinted-glasses when they think about BT1-3, or just confuse them with other games - because much of that stuff was never there to begin with.
They could be fun games, for sure, but they were never great examplary cRPGs, imo - rather relatively simple dungeon crawlers.