Meh - get a bit more Planetside on the damned thing so that maps are big enough for weapon accuracy over range to actually make a difference, big enough to put in vehicles (though not necessarily the Mako) like whatever the Khet equivalent of a Geth Armature turns out to be (and I'm not just saying this because I want Kakliosaur-mounted Krogan cavalry drop-shipped in*)
Since they're putting in Jetpacks (even more Planetside-y) give us a decent parkour movement system to compliment it, literally run up the side of buildings with jetpack assistance to backflip across to another, dual-SMGs blazing in full John Woo style.
Basically for the SP game they're creating bigger, prettier maps (as far as I can gather from the rumour-mill) with more scope for movement (jetpacks) and vehicles (Mako) and smooth transitions between ground and space (it *sounds* like planet landings in the Tempest, or at least Mako drops, will be happening - more like ME1 than ME3) - I'd like to see some of that transition into the MP game... I don't want ME3MP with better graphics, I want ME3MP with more verticality, better scope to move around fluidly, bigger spaces and bigger, better and smarter enemies.
*oh, wait, yes I am!