Currently I'm planning on having minions be stronger when they come out of the base than when they get to the mid line, so pushing into the central entrance with 2 average minion waves against 2 strong minion waves should be fairly difficult (unless you're a built Anivia or something) and I currently think that will work to make pushing lanes difficult. Other ideas are welcome though, if you have any.
I assure you this map is larger than TT, and the lanes are even slightly longer than SR. The jungle is also larger, and the game mode is unique. I don't think it will have a feel anything like the other maps Riot already has out.