Champion aggro on assassins needs changes

ATM the assassin is almost never focused until some other champion dies on their team, allowing enemies to switch their focus (for some reason champions do not draw aggro when dashing).

IMO, this seriously dumbs down the game, since ensuring that the enemy assassins land in a bad spot becomes the sole purpose of the planning phase.

Obviously, range would be too strong if mobility didn't exist, so some form of a dash is needed, but ATM even if you have mostly melee/beefier champions your first concern is positioning against assassins, since if you don't they just get to attack you for free and uninterrupted.

Not sure what the solution is, (as I wrote, strong assassins are needed in the game), but a planning game where planning is completely one-dimensional won't have a long life.