Evident's Comments
Yogg-Saron, Hope's End
It looks like once someone receives lethal damage the spells will stop: https://twitter.com/PlayHearthstone/status/718137544609828865
Yogg-Saron, Hope's End
No, it was just clarified: https://twitter.com/PlayHearthstone/status/718132869109981184
Vlps' Season 25 Mech Shaman
He talked about having success with it on his twitter: https://twitter.com/SPY_Vlps/status/717857207992369152
Naiman's EU Winter Championship Face Hunter
Flame Juggler for Mad Scientist would probably be better. The rest of your replacements are solid, good job!
Control Warrior Deck List Guide - April 2016 (Season 25, Wild)
Second Slam for one Revenge. Baron Geddon, Sylvanas, Loatheb, or Alexstrasza as the second option. For a really cheap option you could try Armorsmith.
Battle of Tol Barad Summoning Stone Mage Deck List
This is a Tavern Brawl deck, so it’s not for use on the ladder or in casual. Here’s a list of the top decks right now: http://www.hearthstonetopdecks.com/deck-category/style/meta-deck/ and here’s a list of more general decks: http://www.hearthstonetopdecks.com/best-hearthstone-decks-for-climbing-the-ladder-in-season-25-april-2016/
Face Hunter Deck List Guide - April 2016 (Season 25, Wild)
Flame Juggler, Huge Toad, or Argent Squire to name a few.
Vlps' Season 24 Elise Starseeker Control Warrior
You might be able to get away with Sylvanas, but Justicar really helps you survive in fatigue/late game.
Deathlord, Fiery War Axe, Death’s Bite, and Acolyte of Pain are your general keeps.