Playing your own bases / Replaying bases
At the moment, the gameplay is in my opinion split to very distinct categories that are intended for different kinds of players. You can raid other people's bases or build your own (although you do need to raid bases to build your own) and I feel like they appeal to very different kinds of players. I think it would be nice to bridge the gap by letting creators raid their own bases and have a leaderboard for least deaths/shortest clear time for each base. To make this work, you would have to be able to replay a base as well as play your own bases. I think this would give most people something more to aspire towards than just "numbers go up". Mirror's edge 2 had a feature like this, where you could set a course for other people to compete against your best time. I think it would be nice to make a base, run it once to get the top leaderboard by default and watch other people try to beat my record, then as I prestige the base and set new records, do it again. This would add some depth to raiding and creating bases.