Ghost changes on PBE
So this board alone is my opinion of the ghost change I see on PBE.
skip over any champion or tl;dr at the bottom at your leisure, this post is my way of posting the issues it will cause for x champion pool
From my standpoint there is a few champions who core this summoner key that have been hit and hit again, and if this ghost hits live servers. It'll ruin something a lot of champions have, An escape.
The list of champions that prefer ghost over flash Thematically

These champions are the champions I believe that prefer ghost over flash, but there is a difference in some. Some of these champions have no form of escape or rely on it so much that this change could affect their gameplay in general.
Dr. Mundo
This champion if you have ever taken ghost you know what I speak of when I say this
Eat your face off
This champion will ghost right into you and just obliterate you with the hellish q's he throws and the giant e steroid that just destroys your health. He can either use ghost as a way to escape with his ult and become hard to pin-pinpoint unless Handled down by cc and damage together. The delay of ghost for the 2 seconds and 10% nerf to it from 45% would ruin the playstyle of how he can charge into the back line or as a way to escape from the enemy team. if you have ever seen the q flinging mundo kite the team away. It was because of ghost and his ult together (movement speed from it).
Singed
This one is the big one for me that i've seen take 3-4 to even 5 direct nerfs to his playstyle. In specific, Proxy or Chase singed till you die.
If you have ever played against singed you know one thing for sure. You always want to chase him, no matter what. It's in your instinct to chase him. The ghost affect that hits singed the hardest is that he relys on ghost as a form of escape or a way to get away and want you to chase him. This directly nerfs Singed to the point where it can be even a challenge to create pressure around the map with this nerf. I've played singed for quite a while now, and can tell you. Ghost and singed are soul mates. He loves it and always will.
Olaf
Oh boi, this one is WOOSH
Ever seen the olaf just ghost instantly hint hint and ult towards you like it's a piece of cake?
Olaf loves ghost and he relies on the instant hit of it instead of the wind-up for his ult. Why? the 2 seconds would give enough time for the enemy to make a decision to make out before olaf can do anything, he would struggle harder with this nerf than even singed :( loves singed Olaf requires and relies on ghost just as bad as the 2 above him. He doesn't mind the 10% nerf from 45% but what he does mind is the acceleration to it.
Shyvana
Ever seen a shyvana dive the adc into a 1v3? What do you think she relies on to keep up with that GIANT kite adc's have? The way shyvana would die from not killing the adc is the support peeling or using utility to save the adc from the Mighty Dragon. This nerf through the acceleration would impact her w after she ults giving her a lot less time to prolong the fight from 7 seconds to 5 at THE BEST. She wouldn't struggle as much as the others but would see a change enough to affect her through it.
Ryze
Wait, 650 movement speed ryze coming through. Fk that he don't need ghost, he is toxic enough with that q movement speed. ON RUSHING TRAIN COMING THROUGH!
Finally udyr
This isn't a trick2g rant, but I don't play udyr enough to say much. However, if you ever seen a udyr run away accross half the map. Ghost was part of it. The acceleration would slow him down a bit, but I think he'll live through it.
TL;DR The acceleration nerf to ghost effects these champions hard, and potentially alter their gameplay or the way the community has labeled them to be played as. I'd just like some consideration for your time for reading or riot looking over and keeping an eye on these champions specifically to make sure they will still be comfy from this nerf.
Thanks for your time!! ^^