So the game will be fun for more than one specific group. For example, when I started playing, I thought the Shine (as in it's actual definition, used as an attack) was absolutely useless. Ness was my main, and I dominated my friends because of his DJC and fair spam. Then I started getting more advanced strategies. My main eventually switched to Falco. I learned more advanced techs, (SHB, Shine cancels, wavedashing, SHFFLing, etc.) and began playing with them as I wanted.
Now, had I not learned these techniques, I would still be playing the game and having fun with my much less technical and complicated game. But since I wanted to advance, and wanted to make the game more complicated, I chose to begin using these techniques. Someone who doesn't want to use them can still have fun playing without being as technical
Sakurai, intentional or no, made an almost perfect fighter in Melee. It's appeal went well beyond it's target audience, and it's one of Nintendo's best selling games because of this.
Removing L cancelling, and by extension, Melee's advanced game, he breaks this wide appeal strategy of Melee, and makes shield grabs better.
On top of this, projectiles are less effective, so you have no choice but to approach.