I think being unable to use flash for x seconds after being hit would be fine.

id say get rid of it and make ghost have like a 30% CC reduction for the half of its duration
flash is OP in my opinion because u can dodge almost all skill shots with it and it mostly used as a free get away as the OP said
if u do the ghost thing u could also update the mastery to add another 10% CC reduc in the mastery
u could do the summoner dash thing i guess to and have ghost make u immune to slows for like 7seconds or sumtin or that sort

Change flash cooldown to 1 second and make it an ability every champion has like blue pill

Then rename the game to League of Ninjas

i dont think you can make ppl happy. you remove flash, thats fine, but ppl will complain about champs that have flash like abilities, like kassadin, katarina, shaco, etc.

im perfectly fine with the way flash is now. its usefulness is balanced by the long cooldown. i play without it just as much as i play with it, so removing it or changing doesnt really bother me. it just make me change the way i play. with it i can be more agressive, especially on a squishy character. you guys call it "bad positioning", i call it being agressive because i know i can get out if i need to. on higher hp or ganking characters, i dont take it. i think exhaust is more useful.

my only real concern about changing it with the proposed dash ability, is that it will more or less make ghost pointless to take. even if its better in certain situations, so was flash, so now we are back to why remove it in the first place.

wouldn't it be easier to just change flash into an invisibility for like 1.5-2 seconds?

you could use it to escape, but, it's counter-able in game (wards, oracle).

it would combine better with other summoner spells, ghost for example (run faster while invis)

it could be used to initiate, use flash in the brush, walk over, smack target.

while it wouldn't effect cc effects, like stun, while invis (unless they have wards/oracle) they can't target you, stopping alot of abilities/spells.

overall, I think it's better then another ghost spell "dash".

I don't think anything should change. Most (not all) melee damage champions are already in a pinch, and flash is needed for them to get in the fight or out alive. Casters don't really need the blink dagger really (well, not all of them), and thus it would only damage melee characters who rely on flash. If you nerf flash at all, you are going to need to buff Tryndamere, Yi, and Warwick, who already all need some help and maybe some retuning for Pantheon and Sion. Of course there are more champions, but I came up with these. In my opinion keep flash the way it is.
EDIT: Also, things that aren't always the players fault (such as a Blitz pull from around the corner) should be able to be canceled out, which most players use flash for. Just having a champ that can change your positioning in the game should not cause you to have to be so cautious that you begin missing experience and gold. If they do land the hit, you are dead instantly without flash.

Adding a damage timer to flash won't solve the main issue "get-out-of-fail" because then you would only have to react half a second faster and flash out of fail before taking damage. Also not to mention with flash you can dodge incomung projectiles from abilities... pfft. Only solution is to remove it completely and not to add a flash item of any sort.

Iunno. Since I can't use it for **** it seems like the only thing to do would make it unable to go through walls. Leave that for Ezreal, Katarina, and Shaco.

/agree

But for a different reason, as I believe a lot of Champions lack "Escape" powers on purpose in their design and playstyle. Thus, many of the more powerful champions without escape methods can become completely imbalanced when the opposing player has finally cornered him.

For example, Ryze. He's got a short stun and all burst. You counter by itemizing to survive his burst and then destroy him. He's got no escape methods... but then Flash! He's on the other side of the wall, charging up his laser again.