Monster Reborn is never coming back; it's as fast as premature burial and and freely take boss monsters from the enemy graveyard; unless grave being a second hand becomes less of a thing, it's not seeing the daylight again.
Also, hazy flames aren't really ridiculously powerful even with the support from the new monarch cards; considering their slow startup due to lack of special summoning skills.
Though it's a given that the OCG is broken; I kinda dismissed it a long time ago when they had triple dragon rulers and shock master as a thing. I'd argue the TCG is more tame, though; at least more tame than the OCG.
Been interested in the crystal beasts for a while; if I were to make a deck on it, though, I'd focus on Rainbow Dragon because for some reason the archetype doesn't feel complete to me without it.
What are your thoughts on pendulum summoning, guys? I honestly think it'll be pretty balanced considering it's a riskreward mechanic, essentially; it takes a long time to set the pendulums on the scales because you need to draw the cards from your deck, and therefore the mechanic is more liable to being screwed over; but when you do finally set it up, you get to swarm a whole bunch of monsters, which could be insane in decks like Evilswarm and Constellars. The only thing I see possibly making pendulum summoning OP is Odd-Eyes, since he can search for other pendulums and make your time of getting them a lot easier. But I'm willing to wait until it comes out to judge fully.
Also, really hyped for Shadoll archetype coming in the Duelist Advent. For now, though, I'm enjoying playing around with Cloudians, Constellars, Arcana Force and Prophecies.