On 1, it's not stopping the dice, but rather the insistence on playing a little animation for each buff / debuff / advantage, even after the target DC number has been reached or exceeded. Yet a natural 20 or 1 immediately bypass these animations.
On 3, as noted, yeah, I know it's subjective and therefore a matter of taste, but I'm getting really fed up with small party RPGs and hanker for a return to the complexity of managing a larger party.
On 4, it's less a problem with the D&D rules regarding resting, but rather that Larian's encounter design and narrative don't seem to fit comfortably with them. Again, almost like they were designed around a different set of rules entirely.