As most other Apex weapons, Charge Rifle existed before Apex, in Titanfall games, where it was mainly an anti-titan energy weapon, but often used in the Coliseum 1v1 no-titan game mode: https://www.youtube.com/watch?v=WoNhTCyTZkY . Havoc was introduced only in Apex, so I'm guessing it may be Havoc's beam mode that was inspired by the Charge Rifle and after that toned down so that the weapon wouldn't become too oppressive at long range. Beam mode didn't prove its worth, so Respawn introduced a true hitscan weapon which is way more fun and efficient at long range, but without the power of the Havoc at close to medium ranges.
However, now that we have the CR, Havoc's beam mode should be changed with something else (maybe launch a gravity grenade or something like that). At the moment, the select fire hopup is good on a Havoc only because it doesn't take a backpack slot to carry it for when you find a Prowler.
Charge Rifle is good on this large map for crowd control. Stop people from pushing, force them to go outside the ring, thin out teams by eliminated respawned enemies as they drop. It can be loads of fun if used right and increases the chances of surviving and winning as a duo or even solo. Players complain about it a lot because most of them still haven't learned their lesson. I keep seeing enemies peeking again and again or running straight, without jumping or even with their back at me after I hit them hard with the CR. But even so, I only get to finish few of them as they're usually too far to push.
I don't agree with CR becoming a care package weapon, because the best way to counter it at long distances is by using it as well. If only 1-2 would drop in the first rounds, the team that picks one up would get too advantaged, very difficult to counter or push against in the open. If it would drop only in late stages, the distance would be too small for the CR to be efficient (especially with the 4x-10x scope) and therefore worse than the dreadful L-Star.