This is kind of a twofer. For one I'd like to see level access specific weapons for 9-16. Now I'm not saying a level 16 nuke but at least give us some incentive for putting in the hours. Secondly some different kinds of weapons would sauce things up a bit. For instance landmines that have to be placed within so many meters of a portal that will drain when walked or driven over. Just make them about as rare as viruses or more. It would also be nice to see some weapons that are more interactive with other players. For instance XMPs that can decrease the effectiveness of another player's bursters so long as you are in range of them.
Created by: eyeoniq - level 16
Level-specific for L9-16 is not a good idea to my opinion, as I see leveling a bit like this :
L1-L3 : pre-school
L4-L6 : school
L7 : studies
L8-L16 : Career evolution.
The gameplay evolution still exists as the recharging range and the XM tank capacity increase with leveling up.
However, landmines, and user-interactive weapons look like a great idea.