1) Cert costs are a tad too high 2) Resources costs are WAY too high for a consumable - 200 infantry resource to blow up a tank, REALLY? 3) In chaotic situations it's almost impossible to tell when you've thrown the C4 or where it's landed 4) The blast radius is a tad too small. Making it much bigger might create problems too, but 1-2 feet wider radius feels perfectly appropriate. Nothing like throwing a brick into a tightly packed enemy squad and getting 1 kill for it somehow. 5) Make the throw a little stronger. It's absurd standing 2 feet behind a tank and watching your C4 fall onto the ground right before he drives off. 6) C4 and friendly explosions NEED a revamp. I've ragequit a few times when I finally manage to sneak up to an enemy sundy, drop 2 bricks of C4 onto countless enemies, only to have a friendly grenade/rocket set off the C4. The result? The "friendly" gets ALL the kills that your C4 created (it even uses the C4 kill icon but doesn't give you credit at all) AND it kills you! You get 1 death and absolutely no reward for your efforts. This is probably the least controversial change. It's incredibly ****** for C4 users.