Project M should be a sequel to Melee. The problem is is that it's a REMAKE of Melee instead, minus wobbling. PM presented a rare opportunity to not only fix the low-tiers, but the top-tiers as well. As I said before, Melee was NOT a well-designed game from a character standpoint. The Dev Team should be trying to replicate the Melee engine, NOT the silly character-specific mechanics. The game balancing was OBVIOUSLY no where near being complete, so why the hell are we trying to replicate the characters of a game that blatantly never had finished testing and developing?
We should use this opportunity to give the Melee top-tiers less polarizing movesets, re-design them. After all, some of the Brawl characters got re-designed. But it would piss some Melee players off? Newsflash: THIS ISN'T MELEE, this is PM. It SHOULD be it's own game. If people want to play silly spacies then they can go play Melee, don't come to a different game if you want to play the EXACT same way as before.
ZSS gets her dash cancel removed, Olimar gets his whistle invincibility removed, Diddy gets a whole banana removed, throws into kills get universally nerfed and don't work at high percents anymore.......but we still have Falco lasers, Peach's silly float cancel meaning ZERO lag on aerials (essentially), Falcon's ridiculous throws into knee, and Fox's Up-Throw Up-Air. And why? Cause Melee. Literally 'cause Melee. (Shiek's not so bad but I feel her tilts can use some knockback adjustments.)
The only significant thing that was actually removed was wobbling.
But no, making aerials safe isn't the only issue with shine. Shine is a 1-frame auto-combo starter, semi-spike, stall option, shield pressure-er, reflector, wake-up option, punish tool, mistake eraser, move. It's a ONE frame jump-cancellation move with little-to-no commitment or risk that does 50 million things at once.
When the only proper option against a move is to ROLL, which doesn't actually do anything for you except reset the situation, then something is wrong with it.
So let me just state that I understand where you're coming from. . .
However, allow us to look at this from a public relations standpoint. Let's say we do follow your idea and we nerf shines to make them less safe on shields. What would this mean for the Melee Fox and Falco players choosing to throw their money into the prize pool for a PM side or main event? It would mean that the character they love to play no longer feels like the same character. Half the reason why people play those characters is for the crazy shield pressure they can crank out and if you take that away, what do we have? A character that has low-lag aerials, with a shine that can no longer be used for shield pressure, (Its main purpose) who can be death-touched by most of the cast, and now has to worry about shield grabs. Last time I checked, grabs are the leading cause of spacy deaths everywhere. These players who would've otherwise entered a tournament and given their money to support our PM community now won't because they don't want these changes to interfere with their already fine-tuned Melee tech. This is one of the reasons why you don't see Sethlon play Melee Roy. Not only is he a low tier with weak shield pressure, no kill options, and an amazing combo weight, he could also mess with Sethlon's PM Roy tech.
The big thing about having more players giving PM a chance is that they could tell their friends about the awesomeness of PM and their friends could tell some more people about it, so on and so forth. We need more people to take interest in this game. It may prove to be pretty detrimental to our community if we decide to nerf spacy shield pressure.
Now, let's take a look at the IC's. What made them good and viable characters? Their grab game, and more specifically, the completely balanced and totally fair wobbling. (Sarcasm) Where, now, would you put the IC's as compared to the rest of the cast after they had wobbling removed? I don't know about you, but I would rate them pretty low seeing as their whole game revolved around getting said grab and converting it into a lost stock for their opponent. That is not to say that they still can't do some grab shenanigans, but after the removal of wobbling (along with some desyncing issues), we no longer see very many IC's. Why? Because Melee IC's don't feel like putting money into tournaments to play a watered-down version of their character.
Would you actually be willing to nerf such a pivotal aspect of a certain character's gameplay, even knowing it could hurt the community as a whole? That's a pretty tough decision to make, and I know I definitely wouldn't want to be the one who makes it.
I personally think, from a public relations standpoint, that it would be a terrible idea to nerf them, especially after so many characters already saw the nerf bat recently. I already know of several people who are either in the the middle of a character crisis, or have quit PM all together because their character doesn't cater to the same playstyle that they enjoyed so much.
I haven't been a part of the competitive community for too long, so take my opinion with a gran of salt. But, personally, I would say keep Fox and Falco as they are. It isn't that hard to escape laser pressure, and there are ways to punish them for attempting shield pressure.