Elytra Speed Gamerule

Instead of now forcing a slower rocket boosting speed on all players, players/servers should decide how fast you can go with an elytra. There should be a gamerule like "/gamerule elytraspeed 100%" which would equal to 1.17 elytra and rocket boosting speed.  This value should be 100% per default, but for example a server with lag problems could reduce that value to 50% for example, to effectively reduce lag. But forcing a slower speed on everyone is a bad idea in my opinion