I know this isn't your fault, but "there's not enough time if we're doing it right" doesn't feel like enough when, a few years ago, Riot was able to do like 4 VGUs a year, while also releasing 4-5 champions.
Instead of accepting this situation as "this is just how it is", I think Riot should be looking at how to make that pace possible again, or at least half of it. Cause we didn't just go from 4 to 2 per year, we went to 1 or ZERO.
While the poll might have been a bit of a mistake, let's remember that in the first or second VGU poll we had TWO WINNERS and Riot managed to get both out without significant delays.
I know you've also said that it's not as easy as "just hire more people", but with the news that some of the champions team got put into gamemodes, that does seem necessary too. I personally don't mind getting less new champions for more gamemodes, but the way that it hurts VGUs (which are already on a bad situation) makes me sad :/
If we were getting many ASUs I wouldn't mind it as much, cause the gameplay part isn't the main thing for me, but the pacing for those is also super slow. The number of outdated stuff in the game has always hurt for those of us who care a lot about the art/lore/state of champions, but in recent years, I think seeing so many champions getting updated for Legends of Runeterra, Wild Rift and concept art/design guides (whatever those are called) has made the issue painfully clear to everyone.