I know these mechanics are in gambit but in crucible as well??

While I do have my list of complains to Gambit mode (and not just it, in fact, it is so long I couldn't squeeze it into single post:)), as member of "Team Defeat" (most recent - 10 lose streak in row, in one sitting, and I wasn't losing on purpose, mind you!), I can say that's it's not the 100% the case. I played roughly 25 hours in Gambit, so what amount of salt you should take with my opinion - whether a grain or a shovel is upon you. Most matches we lost 0-2 and at times we couldn't even summon our primevil (or whatever) before opponents killed their. Without too many invaders from them wiping us all out. And I don't mean rounds where there were just two of us (hello, famous®™© Bungie­®™© reliable®™© connection®™©) and we couldn't even leave damn spawn until the opponents stopped calling any more blockers. As for coming back, all I've seen is that after my teammates grab the motes (as I try not to) they return to the bank only to find it blocked, and it takes some time to kill the blockers. Sometimes losing teammates in process. Along with their motes. So we have to harvest those again. This could explain delayed "comeback". Even without feeling like "these mobs are too hard" I've seen how opponents (already won once) bring more and more motes and we can't even bank at half of their rate. Either we dealing with shielded orange enemies and they're not, or it's not rubberbanding, it's slingshotting (in Soviet Destiny Bungie buffs winning team!;)). Or they got lucky and poured in heavy ammo pouches drop. Which is hilarious, because I have "gambit dress" where I have 4 items with HAP spawn and drop rate is lower, than in PvE with only 1 item with this bonus. In 10 loses streak I mentioned I had matches, where I had zero HAP dropped. In row. And, according to statistics, I wasn't terrible at killing mobs. As for variable "sponginess" of the mobs, I can't tell they suddenly became softer. If it takes 5 rounds from HotC to kill some spherical in vacuum mob, the value is the same throughout round. I'm not saying there are no implementations of "shady techniques", but if they were the case in 100%, my w/l and k/d ratio would be better. :) Or Bungie hates me in particular and buffs my opponents. :D

Obvious catch up mechanic is obvious. I noticed it a long time ago. I've mentioned it here on the forums a lot. There are a lot of players that can tell. But then of course, you get those "white knights" that will deny it to the end. Bungie could come out and directly say, "Yes, we Incorporated catch-up mechanics in crucible, in an attempt to create a level playing field.", and the white knights would say, "No. There is no catch-up mechanics in Destiny. You've all just convinced Bungie that there's something there that really isn't, because you kept saying it." How they don't see it is beyond me, but they're out there. I suspect you'll have some visiting your post shortly, if they haven't already.

I'm not sure I've seen rubber banding on my 300 MBS connection. But I have seen people just standing there in Crucible and I shoot them point blank. Perhaps they should just eliminate any ping over 100 from Crucible.

I'm eager to hear your explanation on how you think that works.