Assassins DON'T need Skillshot Dashes!!!
Many people I have seen on the forums suggesting "let's make Talon's E/Katarina's E/Akali's R a skillshot". And I think that would completely cripple the champion, not because players aren't good and can't land skillshots, but because now, minions and enemy tanks can always block them from getting to the carry. Have you ever played
and have been unable to get to an enemy carry because they are surrounded by minions and tanks? Well, that's why Lee Sin is always built bruiser and almost never built as an assassin silver+, since silver+ is where tanks group around the carries and carries know to stay inside the minion wave when farming. Giving an assassin a skillshot dash makes their ability to get to a carry very conditional and that makes them weak champions and nonviable assassins.
Also, skillshot dashes usually don't reset AA but targeted dashes do.

