Recon - C4 feels inconsistent; clear mines/IR smoke/APS shouldn't remove it.
When I throw 4 C4 at a tank, I don't know what's going to happen. I have found C4 to be super inconsistent in this game. I can't tell exactly, but I know IR smoke in the new patch was clearing C4, I saw my C4 get deleted in mid air by APS, and maybe clear mines (gunner upgrade) is removing it as well?
These interactions need to be removed. The counterplay to C4 is to be awake. It takes 4 C4 to kill a tank, and then you have to move away to safe distance to ensure it all goes off. Giving tanks multiple buttons they can press to completely invalidate your efforts is ridiculous. They should have to beat this strategy by positioning smartly and paying attention. It is a HUGE risk for the recon player to stick 4 C4 on a tank, you almost always have to completely expose yourself, and will get mauled by the gunner instantly if they notice at all (which they have considerable time to do.) Sincerely, I think you need to discuss why you think C4 needs all of these additional answers? Placing now 4 C4 on a vehicle without being noticed is already inherently risky, I have NEVER died to C4 in any Battlefield game and thought "wow there was nothing I could do." It is ALWAYS the player's fault if they die to C4 on their tank.
Additionally I think these mechanics invalidate C4 jeeps too? The counterplay to C4 jeeps is, of course, to shoot at the very obvious transport vehicle hurdling towards you that will explode instantly if you hit it. My favorite all-time BF4 memory is on Caspian border, in a tank, where I noticed a jeep suddenly veer towards me on the minimap while playing with a friend and we started panicking spinning the turret around to hopefully nail the shot, I did, and he exploded moments away from cooking us. It was incredible, hilarious, and even if I had died I would've been laughing. That's battlefield to me. If I could just press smoke/gunner could press clear mines and delete them when they got close, it wouldn't have been interesting or memorable at all. We now finally have large enough maps where C4 jeeps might be more possible, but now they get an "immediately delete them" button.
Finally, I do wonder if the explosion radius is causing consistency issues? I don't know for sure. All I can say is that I do not feel consistently rewarded even if I manage to stick and detonate 4 C4 on a vehicle, and that sucks. I think this drags recon down as well, given it's a huge part of the class.