Yeah, from what I understand no shield, no war caster, no uncanny dodge, no monk arrowcatching... I really hope that either my info is wrong or that it gets changed.
We saw feather fall in the game which is normally a reaction spell, so we'll probably see other reactions skills and spells introduced just without using a reaction to activate.
Uncanny dodge and Arrow Catching would be rather easy to put in, with them affecting the first attack to hit the character on the enemy turn. Counterspell and Warcaster are a bit less clear, would likely change a bit if they are in the game.