The controls in this game are absolute garbage, broken to the point of being anti-intuitive. I have played many RTS, ARPG, and MOBAs; I have never once played one where the characters were so utterly retarded. /AFK is apparently the subtext of literally every button in this game, and the loss of visibility, and RNGesus deciding he hates you.
Moving to a location? Activate horse? Continue to your location? Nah, just /AFK
Use a targeted ability to dash to, pull to you, snipe, or otherwise nail a champion? Follow up by chasing them with auto attacks? Nah, just auto attack that minion next to them instead.
In the middle of combat, chasing an enemy with 1 HP? Activate whirlwind? Continue the chase for that last hit? Nah, just /AFK
How anyone on the dev team, or a single player even qualifies this as functional, no less playable, no less actually good; I’ll never know. Then again, I guess most of them don’t, considering this game has such a dead playerbase that even the developers abandoned it.
/ragequit
EDIT: I posted this further down, but I’ll add it up here too:
Did some super exciting testing in training mode to see exactly how/why this is so broken:
First off, every single stun/knockback in the game triggers /AFK mode on your character. Even instant effects like Lucio’s boop. As does losing visibility on the target, or the target going invincible.
Second, every(?) skillshot cancels your target. This means if you charge into an enemy with Diablo, and then launch fireballs, you’re now attacking a minion, instead of chasing your intended target. Seemingly, it used to work that way with any ability type, which is why the D3 monk was completely unplayable when he came out, but he actually seems quite sticky now.
Some champions seem further broken/bugged. If you right click a target with the D3 Barbarian, and then use whirlwind, it works as expected. However, if you acquired your target by smacking them with Seismic Slam, and then Whirlwind, you go /AFK.
Heals, (and maybe targeted damage abilities, if there are any), don’t negate your inputs. IE: If you tell your character to walk back to base, but heal a guy in the top lane first, you’ll walk to top lane, heal, then walk back to base. However, if you do the same with a damaging skillshot/ground targeted ability, then you’ll /AFK after the ability, and not walk back to base.

