I can try to be a little more productive and throw out some ideas, even though this kind of thing typically doesn’t go anywhere… everyone has ideas, getting everyone to agree is so much different.
First I’d start off by saying that I don’t think it’s particularly hard to make a “good” FPS game - there are plenty of templates already out there to pull from, and since they already seem to be copying the battle royale/extraction method, clearly they’re not against it. I think the hard part is finding out what would potentially link up and work together with EVE Online that will be more difficult to figure out.
Dust 541 had some interesting ideas about how to get EVE Online players involved, and it could be expanded on. I like the idea of maybe having corporations forming battlegroups (maybe 50 players a piece?) that they “hire” on, like joining the corporation. These battlegroups can be placed against other battlegroups from other corporations for large scale war with objectives to capture, not unlike Planetside/Battlefield (that i’ve seen be the predominant idea of what Vanguard should have been in the first place). Additionally, there could be mercenary freelancers to fill in for battlegroups short of their 50 players, basically just people who don’t care about who they fight for and just want to play and can be used to fill in games.
I suppose you’d have to offer some incentive for these people too, maybe ISK that can be spent on varying types of cosmetic armors and weapon skins, similar to how pretty much every FPS game operates these days with battlepass rewards and other store bought skins. People that join a corp battlegroup get payment for completed missions (set by the Corp), and those corps can also set up payment for mercenaries too… basically ways for people to spend their billions from EVE.
They could do something like Commander role from Battlefield, Savage, C&C Renegade… others maybe… capturing points grants resources, the Commander (some guy in EVE) spends those resources on building various defenses and other buildings like producing vehicles. Ticket gameplay like Battlefield would be a good way of running these games, though I also like the Rush, Breakthrough and the tug of war type game modes.
Maybe tie in some new skill trees from EVE that affect these battles, have dedicated functions for these players in EVE, just a different job/another form of gameplay for people to have fun with. Unaffialiated EVE players could also train in these things and maybe get matched with other games, assuming there are enough players in Vanguard to do such a thing.
Multi-battlegroup warfare should be a must. Several different corporations putting their battlegroups in large battles trying to take the resources for themselves, etc etc. 50v50v50v50, etc etc.
I do think there should be more simple immersion mechanics involved in EVE and Vanguard, too. For Vanguard, you could have corp meeting spaces kind of like how guild houses worked in things like Everquest 2 and SWTOR. Corp leaders can design and build their facilities, give Vanguard players options to design their living spaces with their pay, things to collect and display, some other forms of interaction with EVE Online. Possibilities are endless, really.
I’ll add more as I think of it.