Hello, i've been playing HoN and Dota for a few years now and with that experience I state the following.
The all random mode needs an update. The risk of getting an unbalanced team is very likely and thus, reducing the fun of the gameplay.
Now, here you can say "well it's your choice to play AR mode". Ofcourse it is! But we, as a community, must look for better ways to improve the game, and since we are probably the ones playing it, more than the developers, we have to find these tweeks.
Now my suggestion for the AR system is simple. To avoid two unbalanced teams simply implement the following
All random still active, but it chooses from
1 agi hero
2 str heroes
and 2 int heroes
Now this isnt how the setup has to be, but you get the point.
Otherwise the risk of ending up with 5 melee vs 5 ranged heroes and thus GG from the early stages of the game = bad gameplay, and a boring game.