i know there's no real obvious solutions but it really breaks the game and is a complete waste of time when 1 person dc's from the game

which happens far too often for me to be okay with it

maybe add a 20% damage bonus to each player in a 4v5? to help some

That would be kind of insane. Champions can only be in one place at a time, so giving all their allies 20 percent increase would be far better than having the champion in the game.

Still, there is almost certainly some percent increase that would statistically make up for the loss of a player. It's just an empirical question what that percent is.

could i have 50% defense bonus and turrets cant attack me during a 4v5 trololololo

I support this idea 110%. Riot, implement this idea nao!

this is more what i am getting at

Back in the day of Dota, when someone disconnected you could take all their items, and you gained the gold they normally would.

Now if you were to equally share out the gold from said player, it would definitely even things out.

Give them something fair like 5 minutes to reconnect, (sure its a long time in dom, but we should let them try to come back first) once that is done you share out their gold equally. 2500 gold to each remaining player is a decent amount

Heck, you could even micro them! I've won games by taking control of a disconnected Enigma and doing a big push mid, using him as an ult-bot

But seriously, LoL in general would be a game I like playing a lot more if there was statistical bonus granted to the 4 team, especially in Dominion. I realize it's a considerable pain to balance, but this isn't something that effects tournament play, it just makes the daily reality of disconnects less infuriating.

Ideas:
Auto-sell all items in the inventory and distribute the gold.
Buff the remaining champions somehow:

• Gold/5
• XP multiplier
• damage/defense

Buff the towers/creeps.
Allow a surrender vote that does not penalize IP as much as a normal surrender.

You could make it so that if a person is missing everyone on your team turns into Godzilla, but if the other team can cover more ground you'll still lose.

they should also take the IP the dc'er would have gotten and distribute it to the other players