I'm not the best with words, so I'll get straight to my point:
I believe that the developers of Kerbal Space Program 2 should have multiplayer functionality as a higher priority than it already is.
Even in the game's current state, I believe multiplayer would be highly beneficial to the development team, as it would attract more people into the game's player base, as well as help to keep existing players invested. This means more money in their pockets and more motivation in their heads, making it much more likely that they'll be able to successfully fulfill the goals set in their roadmap, shown below:
^ KSP2's current roadmap ^
As can be seen, multiplayer is currently at the final stage of the roadmap.
What do you guys think? Should the developers try to add multiplayer as soon as they can, or should they maintain current course?