Speed will fix lots of issues. My level 49 LOLB plays with 115+ speed. He had 17 TFL's and 4 INTS in AAA last season. Without 100+ speed, I don't think this can happen. If my vision is lower than others, my speed/agility make up for it.
From his last scrimmage
http://goallineblitz.com/game/replay.pl?game_id=659644&pbp_id=457149These are some rough number I'd shoot for.
OLB: 68 speed, 60 agility, 50 vision, 40 tackling, 35 strength, 30 jumping, 25 confidence
The key will be getting speed to the 68 natural cap before level 20 (this will allow you to fill out other attributes and be a solid player as well).