Thanks for playing and for the long writeup! I'm not familiar with the Library in Thimbleweed Park but honestly I think that's an amazing idea. As for combat simplicity I completely agree - I didn't have time for enough special actions for the warriors or spells for the casters so it ended up being close to "whack, whack" which is unfortunate. And yes, Holy Plate was one of the best items in the game but I set the equip target to "None" instead of "Armor" so it's too holy for anybody to use.
The teleport bug is fixable but after the load you have to run back to the room with the key, get the key, then go grab the teleport spell again. It's annoying and took 20 min to fix after the jam. Too bad it ended your run, you're definitely not alone.
100% correct about the scroll bar. It's a surprise to me that most people didn't figure out that it was a scrollable area but why would anybody? There were zero hints that it was. So yes, scrollbar will get added.