Destructiv Play - Questions and Interactions

Here are some Points and Questions about the Atlas Keystone "Destructiv Play" I got.
Could someone clarify these?

- Spawned Bosses don´t count as addational wittnesses.
-- I assume that this is how it is intended even tho I think its sad.
-- Can someone confirm?

- Spawned Bosses do not have Metamorph Organs.
-- Is this a Bug or a tecnical limitation of how Metamorph works?

- Spawned Bosses are not allways possesd if a Map has the affix "Map Boss is possesd"
-- My assumtion is that its not possesd if its a multi part boss.
-- No clear testbasis for this only saw it once but very rarely got this on my maps till now.

- Spawned Bosses get the additional drop chance from Atlas Passives like Guardian Maps.
-- Only tested for Guardian/Conquerer Maps not for connected maps, scarabs & Map currency but works most likely.
-- Is this the only reason for this Keystone?

Yeah you got it. I was super excited for this, and I guess for people doing Maven rotations or Feared, it's just a nice way to get a little extra loot. But the fact that the 10% chance to get an additional maven witness doesn't even work on these bosses when it is a prereq node to take to get to Destructive Play is pretty crappy. I thought this might finally be the node needed to make Maven an alternate option to Altars. But no, Altars are still 100 times better.

Not to mention that if you kill the bosses too fast, you don't even proc Destrutive play as it takes her like 5-10 seconds to summon them and so you have to actually slow down your build and wait for them to get summoned. Just overall very disappointing and really hope that some of these are just bugged interactions.