You can't go invis and do wombos, and you can't use tracking and shadestep at the same time without wasting an exotic

Your nade acts as tracking. That is an advantage of burn, and one reason why it lasting so long is dangerous. As for shoulder charge, I can say from personal experience that it usually results in death for the attempter. You, on the other hand have a melee that grants a shield, ensuring you win any melee battle you are in. As for evades, I agree warlocks should have them, but then again, I'm a Titan. Where is my blink, I still don't have it. That's a warlock and hunter thing. I also don't have ionic blink, that is a warlock thing. The difference between these and a firebolt is they take skill, and when misused result in your death. I agree it would be cool for warlocks to get an evasion move, but that does not change the firebolt being OP. This is just like what happened to sunbreakers. We were overpowered, but we defended our subclass bitterly, then got nerfed into the ground. I just hope your nerf isn't as bad, because all sunsingers need is a tweak. They don't need a nerf.