Reduced Flash in ARAM, Probably not a good thing.
Yippee now there's even less reason to play an assassin or melee champ that isn't a tank with hard CC.
Seriously though, old ARAM's problems were slightly fixed with the snowball change but made tanks too strong.
Then the flash change came (sorry, summoner spell cooldown change), and it did nothing to fix that problem, but it in fact, made it worse. Why would you even want an assassin without hard CC or extreme mobility such as Kha'Zix or Rengar or Evelynn? Why WOULDN'T you dodge when you got a melee bruiser like Darius, Xin Zhao, Skarner or Nocturne? If you play any of these champs (or champs like them), you won't be having fun.
The flash change has made it even easier for ranged powerhouses to stay out of harms' way. If they have a dash then things are even easier for them. This makes them almost impossible to kill for any melee type that doesn't have at least 2 or 3 seconds of hard CC, and even then, they need the entire team to engage upon the enemy. This makes poke champs and tanks wayyyyy stronger, which are the champs that were dominating the Abyss in the first place.
Not to mention how Flash is almost used as a crutch in every single situation in every game, now in ARAM, you'd have to be mentally deficient not to use it.
I've been playing ARAM since it was just midlane in Summoner's Rift, and this is by far the worst thing for ARAM since it has first been played as custom lobbies.
It's literally just exacerbated the problems that ARAM had before, and made them worse. Revert Flash's cooldown PLEASE. (having the other spells' cooldown remain lowered is cool, they might actually be used instead of
)
Or hell, remove it altogether.