I think the game could become safer with changes that remove the advantage of size- bigger field (more routes, rewards agility), fewer downs (more passing & kicking). More important, season-long suspension for charging or head-hunting.
They should institute a rule like in soccer, you commit two personal fouls in a game, you’re ejected and suspended for the next game.
If you accumulate a certain number of personal fouls over a few games, you also would have to sit out a game.
Do you speak Canadian?