Do we deserve to lose LP due to 4v5?

This is one of the most frustrating things in this game, you go in the rift, play the game as usual, someone disconnects, you lose, and so does your league points. A few minutes ago, we were winning the game early, then our top laner disconnects for like 10~15 minutes, by the time he reconnected, the enemy team was at our inhibitors. And yeah, we lost just because one of our teammates is far behind

Can the system change like, if there was a player who disconnects for a long time (5+ minutes), or disconnects frequently within the game (constant disconnect, and reconnecting), the game should be ended via votes conducted by the team who needed to end the game. No LP will be lost by the 4 players but the one who disconnected will receive an LP deduction. And the enemy team would not lose or gain any LP.

Acquiring and losing league points should be based on 5v5s not 4v5...