Aloysius:You can use the Pelican to transport infantry from anywhere on the map to anywhere else on the map you can see. Also the Covenant can use the teleporter to move their units around.
1) Pelicans are weak, slow, and defenseless. A single anti-air unit could bring it down. And I believe there's a certain glitch that lets ground units like Scorpions and Cobras attack them directly(Canister, deployed shot). A base with turrets could bring it down if it passes over. This is the most worthless leader power in the game. I've personally brought down a few of these myself whenever someone thought they'd use it. It's so slow, I swear one time I saw one coming, I just dropped down 10 ODSTs and shot it down midflight.
2) What good are 8 main infantry? Honestly, they take down one building at the most(not a UNSC Reactor), and then they get destroyed by whatever your opponent has(tanks, air, anti infantry, anti vehicle, anti air. It won't matter since the infantry can't fight back with their Y ability already used). Hell, a single Scorpion could wipe out your entire infantry army simply by sitting where you're going to transport them. If the transport distance is long enough, there would be enough distance between for the Scorpion to recharge its Canister and use it on each "wave" of troops.
I have found only ONE use for the pelican and that's it:
Transporting troops over terrain, but only a short distance away.
A perfect example would be Fort Deen between the center base and the teleporter with the 3 sniper towers. Even then, a couple of units and turrets could even shoot down the pelican as it moves the troops that 20 feet, that's how pathetic the Pelican is.