The same reason punts are blocked is the same reason we cant return them now.
PR had gigantic numbers years ago. If a team used AI and had no speed they would let up at least 1 PR td a game. It was fun, but it decided close games just like punt blocks now.
The reason is the "actual" speed gaps created by weight, but by no means are the blocks now as bad as the returns were years ago (in my gaming experience of late)
Balance is the impossible part because of this imbalance of actual speed. The skill ratings are rendered ineffective when top notch actual speed is apllied.
What i see here is another suggestion for a nerf applied to make up for this speed gap. Not that i care what is done to patch/fix code anomiles but i want the speed gaps fixed at some point.
Then we will be able to move forward with alot of what i consider exploits. Punt blocks are one, but currently i still cannot block them at an nfl rate in big games. So....
On the other hand i would say the most competitive users all use some form of what i consider these "speed gap" exploits in other or all areas of the game. Fun or not i have lobbied for these types of "root cause" changes for years.
Of the latest beta changes the value of zero speed has been upped, since i seen little to no blocks in beta, besides TJs team who using a RB at punter. Do these same 96 speed punt blocks happen in beta....IDK? but i know the zone changes have balanced the level of man and zone.
Is it perfect, definitely not ......have we been on 4.5 too long? well at least 6 months too long in my opinion, but that doesn't matter cause the feedback of 4.6 would be like 4.5 and 4.4 and 4.3.....and so on...
Still, he has tired to do the right thing and is looking at the game as whole and , imo , is addressing the most important areas whithin a reasonable scope of where the current code is at in relation to what can actually be fixed with out completely messing another area up.