It's more I'm not liking the sound. I think. Issue 2 is iffy
The tweeters have a decent amount of floor noise, which isn't a huge deal, mainly only noticeable when you're "closer" than you should be at a certain volume level. Plus it's impossible to get rid of floor noise, but the way I understand it the less "sensitive" a speaker is the less noticeable the noise.
The "right" tweeter kinda... cracks... at one particular frequency. Not both, and not based on volume. So I'm guessing it's a hybrid of the tweeter having a slight defect and the only song I noticed the crackling in happens to have the crossover frequency or some other the tweeter would be bad at. If it had to do with the crossover freq, would changing the resistor affect that?
Besides those, they just kinda seem weak, not that sharp. Well, to be fair, I mainly only noticed when I had Mozart/Beethoven piano and orchestra pieces playing to really test the limits - and those things have a crap ton of staccato highs. For regular music they're plenty good, and given the fact that the minimum I would have to pay for another pair of decent floor speakers would be about $250-300, it's certainly not deal breaking.