The modules/Player.lua is missing several channeling casts that should show ticks in MoP Classic. Especially Mind Flay Insanity is essential to proper Shadow Priest play.

To my knowledge a more complete list would be:
} WoWMists and {
--- Mists
-- deathknight
[GetSpellName(42650)] = 8, -- army of the dead
-- druid
[GetSpellName(740)] = 4, -- tranquility
[GetSpellName(16914)] = 4, -- hurricane
[GetSpellName(127663)] = 10, -- astral communion
[GetSpellName(106996)] = 10, -- astral storm
--hunter
[GetSpellName(120360)] = 15, -- barrage
-- mage
[GetSpellName(10)] = 8, -- blizzard
[GetSpellName(5143)] = 5, -- arcane missiles
[GetSpellName(12051)] = 3, -- evocation
-- monk
[GetSpellName(101546)] = 3, -- spinning crane kick
[GetSpellName(113656)] = 4, -- fists of fury
[GetSpellName(115175)] = 8, -- soothing mist
[GetSpellName(115294)] = 6, -- mana tea
[GetSpellName(117952)] = 6, -- crackling jade lightning
-- priest
[GetSpellName(15407)] = 3, -- mind flay
[GetSpellName(129197)] = 3, -- mind flay insanity
[GetSpellName(48045)] = 5, -- mind sear
[GetSpellName(47540)] = 2, -- penance
[GetSpellName(64843)] = 4, -- divine hymn
[GetSpellName(64901)] = 4, -- hymn of hope
-- warlock
[GetSpellName(1949)] = 14, -- hellfire
[GetSpellName(5740)] = 6, -- rain of fire
[GetSpellName(689)] = 6, -- drain life
[GetSpellName(1120)] = 6, -- drain soul
[GetSpellName(755)] = 6, -- health funnel
[GetSpellName(103103)] = 4, -- malefic grasp
}