This threw me into a rabbit-hole of thoughts.
The thing I would love would be to not need to carry 8 chisels on me when I’m building, and to always be swapping them around.
The base of my suggestion rests on the following : wouldn’ it be cool if by pressing some key, you would access a pie-menu (or a wheel if you prefer) where, while still pressing the key, you could use your arrows / console-controller-thumb-thingamajic to access various shape options for your chisel.
(yeah, I had one option that I wasn’t sure what to write inside)
From that, my first line of thought was that maybe all the chisels could operate the exact same way, depending only if you have the epic-chisel skill or not, and only being different in terms of action-speed or durability. But from stone to gem chisels, you would always be able to do all the shapes (well, maybe not if you wanna reshape a decorative gem block).
My second line of thought (which I like better, not gonna lie) was that when accessing the pie-menu of a stone chisel, you would only have Square and Unchisel as options. With an iron chisel, you would have Unchisel, Square, Slope and Bevel. A titanium chisel would give all the options.
Even better, a chisel with the transformation boon could also be an option in the pie-menu, making said chisel even more versatile!
• The game economy would change. You would most likely only see people selling the best chisels.
• HUUUUUGE quality of life improvement, you could go around carrying only one chisel, allowing you to put other tools (or building blocks) in your hand-wheels.