TL;DR
I think Crucible's core game play is good, but networking issues have an inordinately negative effect on the overall experience.

Now, on to the rambling...

I have a relatively poor internet connection. I get dropped some, but not too much. My SP experiences are pretty smooth and very enjoyable (awesome, really), but Destiny's Crucible produces more WTF moments per minute than any other online MP I have ever played. Weird-ass shit constantly, like:

• getting shot through walls (well discussed)
  
• getting melee-ed through floors (see "shot through walls")
  
• getting auto-rifled for a half-second before dying (well discussed)
  
• ineffective attack/melee - bullets stop doing damage, or melee has no effect
  
• fusion-rifling people in the chest for little/no damage
  
• being fusion-rifled one-shotted across the map while partially blocked by a window
  
• shotgun one-shotted from mid-range
  
• being shot at 4-5 times by a shotgun at close range and not taking a lick of damage
  
• being killed by a grenade when well outside of area of effect
  
• killing like 3-4 guardians in close-quarters melee without taking damage

OK - I think most of the above are understood to be latency/lag effects, and conceptually I understand why they exist. I also understand that Bungie cannot be held responsible for my terrible internet connection. What I'm unsure of is why these effects are so dramatic in Destiny? Why do they dominate my Crucible experience so thoroughly? Is it because of dedicated servers? Is it an outcome of the specific architecture of Destiny? Is it a function of connection-speed gap, where perhaps some connections (i.e. fiber, cable) are getting much better/faster while others (i.e. DSL) stay roughly the same?

For me, the outcome of this latency/lag is a disconnection between cause and effect in Crucible. The cycle of play-die-learn is broken; I'm literally fighting the indeterminacy of the gameplay more than I am other guardians. In this match, for this opponent, are we in real-time (balanced)? Am I ahead in time? Am I behind?

I always wonder how my encounters play out for the other player(s). When I've got the drop on someone, but inexplicably land only about 1/4 shots - allowing my opponent to pivot, rush, and shotgun me in the chest (from, like, 20 feet away), what does my opponent think? Do they wonder why I let them get that close? Do they wonder if I ran out of ammo? Do I appear to be shooting into a corner? Do they think I'm butt-ass wasted? Are they convinced they're so awesome?

Note that sometimes I'm on the other side of things - benefitting from the weirdness. Killing guardians while clearly missing them, and surviving encounters I have no business surviving. In SP, I typically finish strikes in the Vanguard playlist with a significantly greater number of kills than both of my teammates. I used to take pride in this, but now can't help but wonder if I'm good at the game or simply have some connection advantage.

It is my opinion that my acute frustration with Crucible is simply a function of the determinism, which is a function of my connection. From this, I'm tempted to draw the conclusion that much of the community's greater frustration with Crucible comes from the same place - but of course, I do not know for sure.

The disconnection between skill/learning and outcome - perceived or real - radically diminishes the satisfaction that normally accompanies an MP experience. It creates randomness in a place where there shouldn't be any. If an ability or weapon or vehicle is overbalanced but consistent, a player can make adjustments. Unpredictable randomness cannot be adjusted for.

I see a lot of comments here where person A will say "Condition A is so annoying and seems wrong" and person B will respond "just execute Response A or B and counter it, it's pretty simple". I think person A would probably have converged on Response A, B, or even C if their experience with Condition A was repeatable. I believe this is why there are such (seemingly) dramatically differing opinions on Crucible - whether it is good or bad, balanced or not, difficult or easy.

I'd love to hear from anyone that has had a quantum change in connection for/during Destiny (or other MP games) and if it made a difference. Finally, at last, we come to my ulterior motive: if I'm going to try to convince my wife that we need a 2nd internet connection, and cable to boot, I'd like to know it's worth it. ;-)