Please gods would you just take the custom makers out of the gatchas and make them a weekly or bi-weekly potato raffle.
This would make the custom maker distribution system a lot more transparent and would turn it into a consistent potato sink.

You could make things like custom mirrors and PAMS possible prizes too with the custom maker being the ~grand prize~

Making loads of super expensive single purchase items, such as clothing, is only going to make those items inaccessible to poorer players and they're barely going to make a dent for wealthier players. The number of potatoes aquired from dailies is not the issue (and if it were, surely you could have just made dailies give out fewer potatoes instead of.. this).

Potato taxes sound awful.

The co-op donation sinks sound like they may have potential, but I don't think they should be unlocking core content, they should be event based.

I've been clinging on for years here, I really want this site to do well, but I really don't see these ideas working out in a way that doesn't just push out anyone who isn't already super wealthy on this site and make them feel unwanted and unvalued.