Moving will be made to interrupt spellcasting at a point in time...

[Estellios]

Seriously, Yoshi-P said right in his post that mages would be getting more insta-cast and CC spells.

Status Ailment Spells and Instant Cast Spells
For casting classes, we will be allocating status ailment spells to each class.
They will be given debuff spells ranging from the core: sleep, paralyze, bind, charm, and heavy to spells that will lower enemy’s stats and resistance to magic.
(We are also planning to add a lot of spells to the currently existing classes at the time of 2.0.)

By commanding these spells which are called “crowd control spells” or “debuffs” in the MMORPG world, you can prevent enemies from getting near you and by combining this with spells that deal damage, you can defeat them before they come in contact with you. This is the fundamental stance for playing a caster class.

Additionally, in order to deal with emergencies when enemies get close, casters will also be armed with instant cast spells. This type of magic has no casting time and as long as the recast timer is up you can just target and activate it in a flash. (There is also non-target AoE magic as well…)
However, in exchange for there being no casting time for these instant cast spells, they will be balanced with low damage for attack spells, low effect duration times for debuffs, be easily resisted, and have long recast timers.

[Yelta_Sumasu]

Seriously, Yoshi-P said right in his post that mages would be getting more insta-cast and CC spells.

I understand we should be getting new abilities in 2.0 but the patch note specifically said "* Moving will be made to interrupt spellcasting at a point in time between patch 1.20 and 1.21." so that explanation doesn't really help us in the meantime unless we are getting some of those spells before 2.0.