More landmass, would just mean more empty space.. islands are allready very empty. Only/just increasing landmass won't fix anything.
What would keep you for taking the other outposts (no i am not trolling), is/would it be different to what it is now? When i played in the past, you had alpha and beta.. alpha was crap so every1 hang around at beta or tried to.. Till some1/things changed that.
Take away sparks or limit them greatly would be a better step, of course alot of replacement for that spark loss needs to be made. e.g remote asset management, good highways, and perhaps homebase spark.
But also the Incentive to be on beta's should be increased greatly (i don't count gamma atm as they are not there). E.g for my miner beta is great, a 2 loads in whatever mk1 bot throw away fit i use and i got 2 of those bots covered allready.
But for my pve/wannabee pvp guy there is not much to do except waiting till something happens. Now i can use my other characters to do stuff, but allthough many have multiple accounts not every1 has. The developers stated that the game shouldn't be about multiboxing... But beta is not rewarding enough compared to the stuff people can do in safety on alpha.
I do not say nerf alpha, as the pve people in the game must have there fun to, but i say beta and later on alpha must be rewarding enough to the taken risk. Create hotspots, saps work great but maybe create something that doesn't need to be scanned.
But to spread activity over even more islands would just mean people will even have a harder time to find pvp. And it's not like it's realy crowded on beta's anyways... or are they?