This has as much to do with the mechanics of attacks as anything else--i.e., advantage, chance for a critical, no such thing as proficiency in armor class. WotC rightly recognized that damage-dealing attacks scale in burst potential much faster than save-based spells.
Wild Sorcerers are basically masters of support, as they can make allies succeed on checks(or enemies fail) as a reaction. They occupy a design space strangely similar to bards, of all things. I like multiclassing them with cleric to pick up Bless as well, so my party gains hyper-accuracy all the time.
1st Round: Use Tide of Chaos to get Advantage on a spell casting using a spell slot. You will have actually "used" your Tide of Chaos only after the effects of the casting are resolved, so the second paragraph (the automatic roll on Wild Surge table) doesn't apply because the situation is still "after you regain the use of this feature," not "before you regain the use of this feature."
WildMage said:Any time before you regain the use of this feature, the DM can have you roll on the Wild Magic Surge table immediately after you cast a sorcerer spell of 1st level or higher. You then regain the use of this feature.