You should have told me you had a smashboards Anthony. I'm sure you remember me, that ex Fox player and the dude from Vrictors channel. looking forward to fighting you again. Welcome to the boards.
To answer your question frame 4 nair would be nice along with less start up lag on the Hero spin. I think anything else would break Link and make him not Link anymore.
I have no idea what you are on about when saying that anything else would not make him Link anymore. Have you ever played a zelda game? Does Link take 650 milliseconds to pull a bomb in any zelda game? Why are you talking about Link's nair?! It's a frame 7 aerial with a lasting hitbox that can gimp and a strong initial hitbox that can KO. Nair landing lag is pretty good and damage is not too bad either. There are other areas that need a lot more attention than his nair. Hero spin is a frame 8 move that can KO (FRAME 8), the thing he lacks mostly is ways to set up the hit.
I'm not even going to talk about buffs in this post. I'm going to talk about how badly Link is designed. Link's bombpull animation lasts for 39 frames and 22 of these frames are completely useless, essentially Link standing still. They could easily make the bombpull a 20 frame action even keeping some of the useless frames. The same happens with dash attack, after Link lands on the ground he essentially stays still for 15 frames. You would expect a skilled and experienced fight to be back on his feet quickly. When Link does the fsmash he essentially freezes for 3 frames seemingly charging up his fsmash, the **** is that about? Also his first hit of fsmash has 36 frames of endlag meaning that if you hit an opponent with 1st hit of fsmash and you don't tipper and follow up with the second hit they have the frame advantage, it also hits of frame 15 and does 7% damage...... Who the hell though that was a good idea? Let's not forget the second hit with it's 55 frames of end lag...55! FRAMES Link has the worst fsmash in the game, never use it, just use ftilt instead. His uncharged bow has 18 frames startup and does 4 damage and has ending lag of 29 frames, around 18 of those is just Link crouching doing nothing. Boomerang hits on frame 27 up close (more or less). Think about that for a moment, it takes Link less time to pull out a bow and an arrow, crouching down then firing it. How the hell is a boomerang throw slower than shooting an arrow?
I'm going to stop for now cause I have some things to do. I'm still waiting for them to implement Link's shield bash, it has loads of potential.