I missed the Mako. Not necessarily because I liked the Mako sequences from ME1 all that much: they pretty much universally sucked. But that said, they FELT right. If you wanted to see what was on a planet, than Bucko, get your butt down there in the wonky dune buggy / tank and see for yourself. Sure, we know that probes and scans are realistic for determining what a planet has. But how can a probe launch return minerals to the ship? Does it launch its own return probe that has to be picked up? Does it teleport entire mountains? At least the Mako, or something like it, would make it feel like you were actually picking something up and bringing it back with you.
Like other people here, I'm playing ME2 on the PC. The mouse works perfectly for scanning, and from what Jordan is saying, I do not look forward to doing it with the controller. With the mouse you can just hold the right (I think it's right) button down and wiggle all over the surface, and then super-spin the planet with a swish to the right or left. It seems like the scanning thing was made for the PC, so why they'd use the same system on the console version seems like a lack of play-testing.
What would have made it all better is a some kind of "All System Scan" you could do upon entering a system. You could get some kind of easy-yet-time-consuming minigame to make it work, something like the tube / circuitry puzzles in BioShock / System Shock II. They could even add a cargo cap to the Normandy II, so that you'd be forced to dock and sell / trade the minerals you didn't need so you could free up the room for more eezo.
But that thing about not being able to buy minerals - that's pretty lame. They should also populate each system with a bunch of ships that you could pirate / destroy / salvage for minerals, for Renegade cred. We're supposedly working with the racist terrorists in Cerberus, right? Like they're not already attacking non-human ships and hacking non-human banks for all their inexplicable money?
If I can come up with all of this after about 6 hours of gameplay at someone else's house, it's hard to believe that BioWare couldn't. But then again, DLC...