I kinda wish fill worked more like that instead of fill = support queue. It's more there to fulfill the need of the system and the queue times than the fill player.
I guess if we really wanted we could roll our own dice with six being reroll or use some RNG website I'm sure exists and let that decide lul
Me I just went from a fill player to a mid/top/jungle player so I can maximize my power over the game. So the system actually lost this fill player from the changes. Before accommodating your teammates often gave your side comfort advantage if you were truly a jack of all trades. No reason to do that anymore. So I dumped playing bot lane seriously so I don't get saddled with 1v3 lanes or have the rest of the map have bot lane fiestas over my own influence.