I'm trying not to ask for more than the hardware can support but, yes, I want that too.

: A new weapon would be nice too:

A jet engine that has a red hot shot feed immediately after the convergent-divergent nozzle; I don't know who could wield it though.

: Or how about a smaller ring, where enemies on the opposite side of the ring
: are within shooting range? Congratulations: Unless it has a ceiling, it
: ain't cover.

Like fighting drones.

What if there are underpasses under roads, big drainage pipes and, um, (bus shelters?) to hide under?

Oh, that reminds me. Id love a level built to three scales: infantry, warthog/scorpion, Scarab. Places to hide, places to drive, and you get to capture a Scarab and it it back down the level, retracing your steps but in a vehicle that beats all.

You earn your fun. You fight hard to reach the prize but then enjoy the fruits of your labours until the level ends. I like a mixture of difficult and easy.

: Oh, and you can flank your enemies by running away from them.

But they'll see you comming :-)

: Yes.

: A teleportation ability.

: Think about this: If you're in an enclosed cylinder or a sphere, there's no
: place where you shouldn't be able to go. The boundary is the floor. So,
: how about a teleportation armor ability that lets you jump to where the
: crosshairs are pointed? Better yet, if you aim it at an enemy, it pops you
: right behind him, ready to assassinate.

Sounds like Portal and press X to win. Maybe it would work at the end of a level or like a FRG - hard to get, doesn't last forever but it can be fun to get easy kills for a while.