I like the idea of a set number of points per round (or at least for the winner).
There's always going to be people that drop out and a variable amount of players from round to round

Less players generally mean less overall points. I just took a look at the spreadsheet and it looks like there has been a decline in overall points per round since the first round
I feel like if the top scorer won 100 points, for example, that would reward people that consistently do well, while still allowing for a competitive game, that doesn't rely as much on the amount of players. My

anyway.