This game might not be what you expect: do your research.
Perpetuum takes a decidedly different approach to what it means to control a robot/mech in a game, in contrast to the lumbering giants of MechWarrior and similar games that fall in line with that scale and aesthetic.
If you are familiar with Eve, then you probably will have a solid grasp of the mechanics, and general features of a true sandbox MMO.
+Price; One time payment for an MMO had me sold, and knowing all skill acquisition is time-based, the sooner I jumped in the better. You are not at all forced/encouraged to buy skill point boosters (no constant flashy in-game ads/tricks to get you to buy stuff at a $ store). I didn’t know about the credit store until much later incidentally. I would argue you don’t need it, but this requires more patience.
+Industry; This is where the slight tweaks from things you might expect from Eve take a little twist. Resource gathering has two flavors to match your playstyle, one more involved than the other, allowing for different degrees of player focus. A simple observation, but allows one to choose indy-activities that are not exclusively biased towards afk-play.
+Combat; Even in PVE you can take on much more difficult spawns if you play the environment and use cover effectively. This is where the game really shines. You can fit stable tanks if you want but will greatly limit what you can contend with on the field.
+/-Market; Typical free-open market sandbox-y MMO thing, starting to become commonplace in all games. True, critical mass of demand and supply is needed to be effective. The player base is small, but effective. Also, player corporations can have in-corp markets, which I will say is a pro and con. Huge incentive for players to join larger corps, but does so at the reduction of supply on the open markets. Take this as an opportunity to sculpt your own market niche in the game and exploit it! Not necessarily an issue of game mechanics, just density.
-Graphics are not great. Not a deal breaker for me given the price range/Free to play status of the game. I would argue for the price, the development team and the work they put in, I think its good.
-Missions/Assignments; they are not so great. Quite bare-bones, not a lot of variety, sometimes buggy! That being said, they are the next thing on the dev’s list to rework.
Bear in mind, my standards are not your standards. This is my perspective. I rarely purchase games, eve had me occupied for years. By my estimation, so will Perpetuum for similar reasons.