This is a fairly optimized evocator build as it is the maximum power/control one can have at submerged sans Lawbreakers (IoP or no IoP, you can't have higher focus than +5). But your assessment of the results is flawed. Here's how my run of the combat ended up;
Round 1:
a) Awesome Gal activates inhuman speed as a supplemental (if she hasn't already) then aims as a normal action
b) Evocator hits Awesome Gal for 8 stress.
Round 2:
a) Awesome Gal, seeing she's facing a big wizardly type and needs to neutralize him fast, smashes the evocator's staff using her huge bonus for smashing things! She rolls at +6 for supernatural strength, +4 for her normal strength, +2 for aiming, maybe +2 for a fate point if she doesn't roll well enough. She smashes the staff even through the evocator's puny block!
b) Evocator shoots his now control-5 evocation and misses.
Round 3:
a) Awesome Gal lifts off the ground and acheives "perfect balance" in thin air.
b) Evocator uses his FP and a good roll for a +9 attack +8 power and Awesome Gal tags "perfect balance" to raise her defense to +10. Odds are she avoids it but at worst she takes a mild consequence.
Round 4:
a) Seeing she's a bit hurt, Awesome Gal uses her speed's free move (plus supplementals if required) to position herself in the desired location (and readies to use that speed again - but the Evocator doesn't know that)
b) Evocator "focuses" so he gets a bonus to control so he can use more power on his next spell.
Round 5:
a) Awesome Gal just sits there, waiting for the next attack (still readying)
c) Evocator rolls well, tags Awesome Gal's consequence and his "focused" aspect to nova at Control 11 Power 13 (mild mental and 2 backlash taken). Awesome Gal uses her readied action to superspeed-move around a building corner, behind a tree or other cover that can take the hit instead of her (having positioned herself right after she was hurt and expecting a nova). With 7 zones movement she could even move out of the evocator's sight completely. Thus she dodges the nova.
In your assessment, you missed a few things;
1) Once they have the initiative, a highly mobile enemy can always ready to avoid enemy attacks from a single opponent. Unless the fight is in some featureless plane, they can also always disengage after they've dealt some damage, wait a few mins for stress recovery then come back in for round two with that damage still there. Said damage includes resources the wizard cannot recover such as uses/day for his enchanted items. I decided not to go this tactical approach because a) it is highly annoying and takes forever to run and b) the speedster pretty much wins outright.
2) Big magic items give a bonus to others noticing them equal to their bonus. So a lore of +3 trying to sense a +5 item rolls at Legendary ( +8 ), pretty much always succeeding. Also, an item with 5 focus slots is staff-sized and thus physically obvious.
3) Strength powers DO give big bonuses to attacking objects with Might. Foci and enchanted items are objects so a superstrong character can easily smash a wizard's focus and enchanted items. But that's not the only way. Awesome Gal could have broken the floor under the wizard's feet, using Might with the breaking bonus as a maneuver to trip him if they were on normal ground, as an attack if they were on a building/bridge/high place and he could fall through the hole. She could have dropped the roof on him or a car (or other heavy weight), making a block with her strength power bonus by burying him under the weight.
4) Suppose the Evocator won the fight. He still would not do so easily. But casters are at their absolute strongest vs single enemies in short combats. If he and Awesome Gal both had to fight a large number of enemies such as a dozen ghouls, gruffs, elves and the like, chances are he'd die messily while she'd wipe the floor with them.
As you can see, strength and speed are just as useful as major evocation talents. They might be of less
utility than thaumaturgy, but give a guy with supernatural strength a couple of minutes and he can still bring down the Empire State Building.