The reasoning behind this: giants and golems are your tanks. They also move slower than your DPS. Currently, troops come out in the order that you unlock them (barb, arch, gob, etc.). This means that most of your DPS units (archers and wizards in particular) will deploy before your giants or golem can come out of the CC and often will be targeted before your giants or golems can acquire the defense.

This should improve the diversity of CCs, especially on offense. This could also make giants a bit better for defensive CCs.