C4 & PSR Challenge

Just some feedback - Compared to last titles, C4 doesn't feel like it does enough damage to heavy armor, and the blast radius feels very low when used against infantry. I doubt I'm the only one who has mentioned this so sorry if I'm repeating a post. I'm also aware of the engineering and armor perks, but still doesn't excuse the weakness against infantry. Just isn't as fun to use as previous titles.

The PSR challenge also seems unnecessarily difficult. I get it is the last unlock (for now at least), but there are only a few maps that even have 200+ meter firing lanes. then you spend time away from objectives just to attempt to make progress. People are resorting to Portal to farm bots on firestorm - and i don't blame them.

EDIT: to add, the psr rifle isn't even that great compared to the m2010 esr. all of that grind and it has worse projectile speed? will also say its not just the PSR challenge that should be looked at. several challenges seem a bit overkill for the average player. The difficult challenges should not be tied to base game guns and gadgets in my opinion.

Curious what others think.