Just remember that Finchy is the chef, and that they can either incorporate your suggestion or ignore it. With the exception of a romance update, I'd like to treat my ideas as small things that realistically shouldn't take too much effort to do. I think without a doubt the romance update will be nice, but it might come out (v.0.4.7), and we are just about to get (v.0.1.5).
Subscribestar is where Finchy posts weekly updates, and the timeframe set is around end of month for the update. Itch.io will have the free updates while Substar has the paid updates, and I'm unsure how Finchy plans on doing the updates between free and paid. It might be "dead" as far as the free version goes once v.0.1.5 comes out, might be staggered (paid gets every update from v.0.1.5 to v.0.2.5, while it jumps from v.0.1.5 to v.0.2.5 for free), or the free gets a steady update string that is 5 version behind paid.
I myself have pledged some cash to Finchy, so I'm using Itch.io as a public board for ideas since (as far as I know) Substar doesn't let people post public ideas that everyone can look at, it is just dm between Finchy and you, and I don't know how to dm someone ideas. Plus since the ideas are public, a simple thumbs up or down can allow others to convey that the posts idea is worth doing, or that it's cringe.