I don't think you need the +speed anymore with Sprinter. Most cards are 99 speed with Brawler and you don't lose agility. Fast and agile is the move imo.
I run max sprinter, just don’t have it on linemen. I am running a 50/50 cards team at moment so the team boosts cancel the stat loss out. I think acceleration is more important than strength in my skill players.
I recently switched from Brawler to Sprinter. I’m not sure if it made any difference at all
Went Brawler for everyone, but thinking now about going to Sprinter. It’s the age old debate. Which have you maxed?