Less has nothing to do with it when you got to relie on a wonky 3rd party sight to keep track of errata/faq that is Frustrating for new players. They come here for answers then get directed to BBG for a game they bought. Or they got to contact FFG for constant "am I reading this right questions". This is why errata is frustrating and I'm not speaking for myself I'm speaking for the new guy/gal who picks up the game thinking its a smooth running game because it isn't and its getting worse.
You're not wrong. FFG has been struggling with vague or poorly worded rules since I starting collecting games of theirs. Descent is worse than most due to how intense the competition between OL and heroes can sometimes get. You can get lost in the rules debates if you let yourself. You can make house rules to suit your own personal tastes if you're so inclined. Or you can get frustrated with it all and either shelf the game or sell it off. It may not be fair, but it's true.
At some point, we the customers have to take responsibility for how we spend our money. Products that don't sell will either die off or improve. So if you're not happy with the game, stop buying expansions for it. In the Age of the Internet, I don't even think it's unfair to ask the customer to do research on a product before buying into the core set, so even newbies aren't really off the hook on this one.
Jane isn't that complicated to play with but if wording on games causes this much confusion the game will feel broken out of the box. Plot decks are next are they being written right? Or should we wait for the errata on those too?
There will almost certainly be issues with the LT plot decks that call for errata, or at least FAQage. If you want to buy them just for the minis, you could do that and ignore the plot decks. Or you could wait a few months and see how bad things get on the forums before deciding if the LTs are really worth it.