I don't think any sport has been "fixed" as much as pool, in both meanings of the word!
First there was going from 10 foot tables to 9 foot tables. 4 inch pockets to 5 inch pockets, 5 inch to 4,5 inch pockets, cutting the legs of the tables to save on wood, deeper shelves on slates, bouncier rails. And now bar tables with bouncy rails, deep shelves and tight pockets. I'm sometimes glad the English are so damned conservative that snooker has been mostly left alone. Even though there have been some slight changes in equipment here too, they have been mostly good for the game.
Or how about the rule changes in 9 ball, 8 ball and 10 ball? Even straight pool has been cursed with constant changing of the rules, especially when it comes to fouls..sigh. Pool is not a good sport for tv and most of the bad changes have been made either to save on pool room space or materials OR to try to speed- or "jazz" up the game for tv. I sometimes wish people could leave the game alone, but I understand the desperation of people who see poolrooms close and disappear all around them.
I don't think there is any "one" thing that could change it all around for pool, but I do not think destroying the game in an attempt to appeal to the masses is the way to go.
They keep fixing it so much, they keep it perpetually broken.
Back when I started playing, it was you, your cue and the table (no matter if you could play or what condition the equipment was in). There were pros back then who could do everything and you tried to watch them, learn something, and then hopefully be able to do it yourself.
Now if you take a new player in the pool hall they are overwhelmed with all the hype and BS.
They will tell you that you won't be able to make a ball unless you have a high-dollar custom cue with a special LD shaft. Then you need a break cue with a special high-dollar tip that only two guys in the world can replace...but rest easy...they'll give you a good price and take a year or two...or maybe never if you read some of the stories on here. However, don't worry...you can use your $600 jump cue while the tip on your break cue is being fixed. Make sure you get joint protectors too...you don't want something to damage your pin if your cue was to fall out of it's case in a plane crash or something.
Once you get that, you'll need a Magic Rack of some sort, because you know nobody can make a ball with a regular rack.
Oh, then you need lessons from some guy who never won a thing in his life, but went to ABC pool school and that will only be $400 for a couple hours and they'll teach you what a pool table looks like and where and how to stand.
After that, you'll be advised to join a league and play with other bangers for about $25 a night to hone your skills.
And after about 10 years of banging, they will move you up to an APA-3 and tell you that you are coming along fine.
OH...and don't forget to buy a tuxedo. When they start the tournament to see if you move up to a level 4 you will need to look appropriate.