The game in itself is slowed down by all animations. That is normal but…
Since 1.5 animation that trigger when a creature is spawned take a long time.
It is not like the animation itself is slower than before, the game kind of waits 1-2 seconds before playing the animation.
So for instance i play eldrazi twins
The first one enters the battle playing his animation
1-2 second of nothing
The second one plays his animation.
In story mode I played against hangarback walker.
Zzzzzzzzz…
Edit: looks like over time the problem disappeared.
Still the ai some time think a little too much for the next move.
also as already reported from others game gets stuck sometime during a match.