Here's how you fix the game.
Gameplay
1. Clearly define the catch.
2. Make 2 different pas interference penalties.
-Minor PI is 10 yards only OR 5 yards and replay down. Only an automatic first down if the penalty yards are enough for the first. Offense chooses.. This is for the touch fouls that may have hindered the receiver. The receiver MUST make a play on the ball or no call at all. No more getting touched then looking at a ref for a flag while the ball sails 10 yards overhead.
- Major PI is a spot foul and automatic first down. This is when the receiver is blatantly held or shoved. Again, the receiver must still make a play for the ball unless he is unable.
Both are reviewable.
Safety
1. Weight limits based on a combination of BMI and body fat % per position. Not so long ago, 300 lb players were rare. Players keep getting bigger and it is hurting the game. The blocking was so much better when OL were in the 290 range. Guys could move their feet.
Going by BMI and body fat would allow for the guy who is naturally huge. I don't know what the formula would be but the point would be to reduce the average weight at most positions, particularly OL, DL, RB, TE, and LB.
If we got back to 290 lb linemen, 200-220 lb backs and backers, and 180-200 lb DBs and WRs the game would be much better. A lot fewer injuries, not just a reduction in concussions, but i'd bet a bunch less ligament injuries as bodies would no longer be pushing the limits as much.
2. If a WR jumps for a catch, then he is down as soon as he hits the ground. If the DB isn't allowed to jump to hit him, then the WR should not be allowed to advance since the DB is forced to "let" him catch it.
3. Designate a "Middle" of the field for passing. This would pretty much be the defensive "box" from tackle to tackle and about 10 yards deep. Small WRs under a certain size are considered down by contact as soon as they catch the ball in this box. Why? Because if a LB isn't allowed to hit a WR then that WR should not be allowed to benefit and advance the ball further.
These players would be designated by their numbers. Small WRs get numbers in the teens and big WRs and TEs get numbers in the 80s and they are allowed to get hit so they are allowed to advance the ball over the middle.
This would cut down on the trend of sending tiny WRs over the middle. That is a big source of concussions because these guys have no business going in that area.