Sure, I understand that argument. The trouble with it is that at first level, it's a clear advantage.
No, it's really not.
At 1st level, you've got one daily power. For your Human Rogue who has this extra feat, that's +1 to hit. So, if you assume the Rogue would have had a 50% chance of hitting with Trick Strike before, then he has a 55% chance.
The Elf Rogue can reroll that attack. From a 50% chance of hitting, they go up to a 75% chance of hitting with their most potent attack.
Getting +1 to hit on all attacks is cool. Getting (effectively) +5 on the attack that you really want to hit with? That's very cool.