As the game have a new navigation style and shows delta-v on transfer (I prefer say xfer) window, there's a need for a built-in design calculator and in-flight delta-v calculator (someone have made a mod on that, but it might not accurate).
Delta-v, TWR, burn time. Delta-v is the most important stuff when there's a mission, we need to know the delta-v on spacecraft to make things happen, especially in Hard and Realistic Difficulty in SFS. (There is a delta-v map for SFS and REAL WORLD.) When landing on another planet, TWR is required stuff. (actually there's a built-in TWR calculation in SFS)
Someone think a Built-in Design Calculator is not required on a simple game, but I personally think it's needed when design a rocket and flying a mission. Someone made a design calculator on SFS but it does badly when there's a fairing.
Delta-v, TWR, burn time. Delta-v is the most important stuff when there's a mission, we need to know the delta-v on spacecraft to make things happen, especially in Hard and Realistic Difficulty in SFS. (There is a delta-v map for SFS and REAL WORLD.) When landing on another planet, TWR is required stuff. (actually there's a built-in TWR calculation in SFS)
Someone think a Built-in Design Calculator is not required on a simple game, but I personally think it's needed when design a rocket and flying a mission. Someone made a design calculator on SFS but it does badly when there's a fairing.